ish: Trim down the release branchstabilize-wristpin-14469.59.B-ish stabilize-voshyr-14637.B-ish stabilize-quickfix-14695.187.B-ish stabilize-quickfix-14695.124.B-ish stabilize-quickfix-14526.91.B-ish stabilize-14695.85.B-ish stabilize-14695.107.B-ish stabilize-14682.B-ish stabilize-14633.B-ish stabilize-14616.B-ish stabilize-14589.B-ish stabilize-14588.98.B-ish stabilize-14588.14.B-ish stabilize-14588.123.B-ish stabilize-14536.B-ish stabilize-14532.B-ish stabilize-14528.B-ish stabilize-14526.89.B-ish stabilize-14526.84.B-ish stabilize-14526.73.B-ish stabilize-14526.67.B-ish stabilize-14526.57.B-ish stabilize-14498.B-ish stabilize-14496.B-ish stabilize-14477.B-ish stabilize-14469.9.B-ish stabilize-14469.8.B-ish stabilize-14469.58.B-ish stabilize-14469.41.B-ish stabilize-14442.B-ish stabilize-14438.B-ish stabilize-14411.B-ish stabilize-14396.B-ish stabilize-14395.B-ish stabilize-14388.62.B-ish stabilize-14388.61.B-ish stabilize-14388.52.B-ish stabilize-14385.B-ish stabilize-14345.B-ish stabilize-14336.B-ish stabilize-14333.B-ish release-R99-14469.B-ish release-R98-14388.B-ish release-R102-14695.B-ish release-R101-14588.B-ish release-R100-14526.B-ish firmware-cherry-14454.B-ish firmware-brya-14505.B-ish firmware-brya-14505.71.B-ish factory-kukui-14374.B-ish factory-guybrush-14600.B-ish factory-cherry-14455.B-ish factory-brya-14517.B-ish

In the interest of making long-term branch maintenance incur as little technical debt on us as possible, we should not maintain any files on the branch we are not actually using. This has the added effect of making it extremely clear when merging CLs from the main branch when changes have the possibility to affect us. The follow-on CL adds a convenience script to actually pull updates from the main branch and generate a CL for the update. BUG=b:204206272 BRANCH=ish TEST=make BOARD=arcada_ish && make BOARD=drallion_ish Signed-off-by: Jack Rosenthal <jrosenth@chromium.org> Change-Id: I17e4694c38219b5a0823e0a3e55a28d1348f4b18 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3262038 Reviewed-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Tom Hughes <tomhughes@chromium.org>
author: Jack Rosenthal <jrosenth@chromium.org> 2021-11-04 12:11:58 -0600
committer: Commit Bot <commit-bot@chromium.org> 2021-11-05 04:22:34 +0000
commit: 252457d4b21f46889eebad61d4c0a65331919cec (patch)
tree: 01856c4d31d710b20e85a74c8d7b5836e35c3b98 /chip/mt_scp/rv32i_common
parent: 08f5a1e6fc2c9467230444ac9b582dcf4d9f0068 (diff)
download: chrome-ec-stabilize-14498.B-ish.tar.gz
21 files changed, 0 insertions, 2398 deletions
diff --git a/chip/mt_scp/rv32i_common/build.mk b/chip/mt_scp/rv32i_common/build.mk
deleted file mode 100644
index ac7e13db77..0000000000
--- a/chip/mt_scp/rv32i_common/build.mk
+++ /dev/null
@@ -1,27 +0,0 @@
-# -*- makefile -*-
-# Copyright 2020 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-#
-# SCP specific files build
-#
-
-CORE:=riscv-rv32i
-
-# Required chip modules
-chip-y+=rv32i_common/cache.o
-chip-y+=rv32i_common/gpio.o
-chip-y+=rv32i_common/intc.o
-chip-y+=rv32i_common/memmap.o
-chip-y+=rv32i_common/system.o
-chip-y+=rv32i_common/uart.o
-
-ifeq ($(CONFIG_IPI),y)
-$(out)/RW/chip/$(CHIP)/rv32i_common/ipi_table.o: $(out)/ipi_table_gen.inc
-endif
-
-# Optional chip modules
-chip-$(CONFIG_COMMON_TIMER)+=rv32i_common/hrtimer.o
-chip-$(CONFIG_IPI)+=rv32i_common/ipi.o rv32i_common/ipi_table.o
-chip-$(CONFIG_WATCHDOG)+=rv32i_common/watchdog.o
-chip-$(HAS_TASK_HOSTCMD)+=rv32i_common/hostcmd.o
diff --git a/chip/mt_scp/rv32i_common/cache.c b/chip/mt_scp/rv32i_common/cache.c
deleted file mode 100644
index 62147590fe..0000000000
--- a/chip/mt_scp/rv32i_common/cache.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "cache.h"
-#include "console.h"
-#include "csr.h"
-
-extern struct mpu_entry mpu_entries[];
-
-void cache_init(void)
-{
-	int i;
-	uint32_t mpu_en = 0;
-
-	/* disable mpu */
-	clear_csr(CSR_MCTREN, CSR_MCTREN_MPU);
-
-	/* enable i$, d$ */
-	set_csr(CSR_MCTREN, CSR_MCTREN_ICACHE);
-	set_csr(CSR_MCTREN, CSR_MCTREN_DCACHE);
-
-	/* invalidate icache and dcache */
-	cache_invalidate_icache();
-	cache_invalidate_dcache();
-
-	/* set mpu entries
-	 *
-	 * The pragma is for force GCC unrolls the following loop.
-	 * See b/172886808
-	 */
-#pragma GCC unroll 16
-	for (i = 0; i < NR_MPU_ENTRIES; ++i) {
-		if (mpu_entries[i].end_addr - mpu_entries[i].start_addr) {
-			write_csr(CSR_MPU_L(i), mpu_entries[i].start_addr |
-						mpu_entries[i].attribute);
-			write_csr(CSR_MPU_H(i), mpu_entries[i].end_addr);
-			mpu_en |= BIT(i);
-		}
-	}
-
-	/* enable mpu entries */
-	write_csr(CSR_MPU_ENTRY_EN, mpu_en);
-
-	/* enable mpu */
-	set_csr(CSR_MCTREN, CSR_MCTREN_MPU);
-
-	/* fence */
-	asm volatile ("fence.i" ::: "memory");
-}
-
-#ifdef DEBUG
-/*
- * I for I-cache
- * D for D-cache
- * C for control transfer instructions (branch, jump, ret, interrupt, ...)
- */
-static enum {
-	PMU_SELECT_I = 0,
-	PMU_SELECT_D,
-	PMU_SELECT_C
-} pmu_select;
-
-int command_enable_pmu(int argc, char **argv)
-{
-	static const char * const selectors[] = {
-		[PMU_SELECT_I] = "I",
-		[PMU_SELECT_D] = "D",
-		[PMU_SELECT_C] = "C",
-	};
-	int i;
-
-	if (argc != 2)
-		return EC_ERROR_PARAM1;
-
-	for (i = 0; i < ARRAY_SIZE(selectors); ++i) {
-		if (strcasecmp(argv[1], selectors[i]) == 0) {
-			pmu_select = i;
-			break;
-		}
-	}
-	if (i >= ARRAY_SIZE(selectors))
-		return EC_ERROR_PARAM1;
-
-	ccprintf("select \"%s\"\n", selectors[pmu_select]);
-
-	/* disable all PMU */
-	clear_csr(CSR_PMU_MPMUCTR,
-		  CSR_PMU_MPMUCTR_C | CSR_PMU_MPMUCTR_I |
-		  CSR_PMU_MPMUCTR_H3 | CSR_PMU_MPMUCTR_H4 |
-		  CSR_PMU_MPMUCTR_H5);
-
-	/* reset cycle count */
-	write_csr(CSR_PMU_MCYCLE, 0);
-	write_csr(CSR_PMU_MCYCLEH, 0);
-	/* reset retired-instruction count */
-	write_csr(CSR_PMU_MINSTRET, 0);
-	write_csr(CSR_PMU_MINSTRETH, 0);
-	/* reset counter{3,4,5} */
-	write_csr(CSR_PMU_MHPMCOUNTER3, 0);
-	write_csr(CSR_PMU_MHPMCOUNTER3H, 0);
-	write_csr(CSR_PMU_MHPMCOUNTER4, 0);
-	write_csr(CSR_PMU_MHPMCOUNTER4H, 0);
-	write_csr(CSR_PMU_MHPMCOUNTER5, 0);
-	write_csr(CSR_PMU_MHPMCOUNTER5H, 0);
-
-	/* select different event IDs for counter{3,4,5} */
-	switch (pmu_select) {
-	case PMU_SELECT_I:
-		/* I-cache access count */
-		write_csr(CSR_PMU_MHPMEVENT3, 1);
-		/* I-cache miss count */
-		write_csr(CSR_PMU_MHPMEVENT4, 3);
-		/* noncacheable I-AXI access count */
-		write_csr(CSR_PMU_MHPMEVENT5, 5);
-		break;
-	case PMU_SELECT_D:
-		/* D-cache access count */
-		write_csr(CSR_PMU_MHPMEVENT3, 11);
-		/* D-cache miss count */
-		write_csr(CSR_PMU_MHPMEVENT4, 12);
-		/* noncacheable D-AXI access count */
-		write_csr(CSR_PMU_MHPMEVENT5, 14);
-		break;
-	case PMU_SELECT_C:
-		/* control transfer instruction count */
-		write_csr(CSR_PMU_MHPMEVENT3, 27);
-		/* control transfer miss-predict count */
-		write_csr(CSR_PMU_MHPMEVENT4, 28);
-		/* interrupt count */
-		write_csr(CSR_PMU_MHPMEVENT5, 29);
-		break;
-	}
-
-	cache_invalidate_icache();
-	cache_flush_dcache();
-
-	/* enable all PMU */
-	set_csr(CSR_PMU_MPMUCTR,
-		CSR_PMU_MPMUCTR_C | CSR_PMU_MPMUCTR_I |
-		CSR_PMU_MPMUCTR_H3 | CSR_PMU_MPMUCTR_H4 |
-		CSR_PMU_MPMUCTR_H5);
-
-	return EC_SUCCESS;
-}
-DECLARE_SAFE_CONSOLE_COMMAND(enable_pmu, command_enable_pmu,
-			     "[I | D | C]", "Enable PMU");
-
-int command_disable_pmu(int argc, char **argv)
-{
-	clear_csr(CSR_PMU_MPMUCTR,
-		  CSR_PMU_MPMUCTR_C | CSR_PMU_MPMUCTR_I |
-		  CSR_PMU_MPMUCTR_H3 | CSR_PMU_MPMUCTR_H4 |
-		  CSR_PMU_MPMUCTR_H5);
-	return EC_SUCCESS;
-}
-DECLARE_SAFE_CONSOLE_COMMAND(disable_pmu, command_disable_pmu,
-			     NULL, "Disable PMU");
-
-int command_show_pmu(int argc, char **argv)
-{
-	uint64_t val3, val4, val5;
-	uint32_t p;
-
-	val3 = ((uint64_t)read_csr(CSR_PMU_MCYCLEH) << 32) |
-			read_csr(CSR_PMU_MCYCLE);
-	ccprintf("cycles: %lld\n", val3);
-
-	val3 = ((uint64_t)read_csr(CSR_PMU_MINSTRETH) << 32) |
-			read_csr(CSR_PMU_MINSTRET);
-	ccprintf("retired instructions: %lld\n", val3);
-
-	val3 = ((uint64_t)read_csr(CSR_PMU_MHPMCOUNTER3H) << 32) |
-			read_csr(CSR_PMU_MHPMCOUNTER3);
-	val4 = ((uint64_t)read_csr(CSR_PMU_MHPMCOUNTER4H) << 32) |
-			read_csr(CSR_PMU_MHPMCOUNTER4);
-	val5 = ((uint64_t)read_csr(CSR_PMU_MHPMCOUNTER5H) << 32) |
-			read_csr(CSR_PMU_MHPMCOUNTER5);
-
-	if (val3)
-		p = val4 * 10000 / val3;
-	else
-		p = 0;
-
-	switch (pmu_select) {
-	case PMU_SELECT_I:
-		ccprintf("I-cache:\n");
-		ccprintf("  access: %lld\n", val3);
-		ccprintf("  miss: %lld (%d.%d%%)\n", val4, p / 100, p % 100);
-		ccprintf("non-cacheable I: %lld\n", val5);
-		break;
-	case PMU_SELECT_D:
-		ccprintf("D-cache:\n");
-		ccprintf("  access: %lld\n", val3);
-		ccprintf("  miss: %lld (%d.%d%%)\n", val4, p / 100, p % 100);
-		ccprintf("non-cacheable D: %lld\n", val5);
-		break;
-	case PMU_SELECT_C:
-		ccprintf("control transfer instruction:\n");
-		ccprintf("  total: %lld\n", val3);
-		ccprintf("  miss-predict: %lld (%d.%d%%)\n",
-			 val4, p / 100, p % 100);
-		ccprintf("interrupts: %lld\n", val5);
-		break;
-	}
-
-	return EC_SUCCESS;
-}
-DECLARE_SAFE_CONSOLE_COMMAND(show_pmu, command_show_pmu, NULL, "Show PMU");
-#endif
diff --git a/chip/mt_scp/rv32i_common/cache.h b/chip/mt_scp/rv32i_common/cache.h
deleted file mode 100644
index 13e5ad1a42..0000000000
--- a/chip/mt_scp/rv32i_common/cache.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef __CROS_EC_CACHE_H
-#define __CROS_EC_CACHE_H
-
-#include "common.h"
-#include "csr.h"
-#include "stdint.h"
-#include "util.h"
-
-/* rs1 0~31 register X0~X31 */
-#define COP(rs1) (((rs1) << 15) | 0x400f)
-
-#define COP_OP_BARRIER_ICACHE		0x0
-#define COP_OP_INVALIDATE_ICACHE	0x8
-#define COP_OP_INVALIDATE_ICACHE_ADDR	0x9
-
-#define COP_OP_BARRIER_DCACHE		0x10
-#define COP_OP_WRITEBACK_DCACHE		0x14
-#define COP_OP_WRITEBACK_DCACHE_ADDR	0x15
-#define COP_OP_INVALIDATE_DCACHE	0x18
-#define COP_OP_INVALIDATE_DCACHE_ADDR	0x19
-/* FLUSH = WRITEBACK + INVALIDATE */
-#define COP_OP_FLUSH_DCACHE		0x1C
-#define COP_OP_FLUSH_DCACHE_ADDR	0x1D
-
-static inline void cache_op_all(uint32_t op)
-{
-	register int t0 asm("t0") = op;
-	asm volatile (".word "STRINGIFY(COP(5)) :: "r"(t0));
-}
-
-static inline int cache_op_addr(uintptr_t addr, uint32_t length, uint32_t op)
-{
-	size_t offset;
-	register int t0 asm("t0");
-
-	/* NOTE: cache operations must use 32 byte aligned address */
-	if (addr & GENMASK(3, 0))
-		return EC_ERROR_INVAL;
-
-	for (offset = 0; offset < length; offset += 4) {
-		t0 = addr + offset + op;
-		asm volatile (".word "STRINGIFY(COP(5)) :: "r"(t0));
-	}
-
-	return EC_SUCCESS;
-}
-
-/* memory barrier of I$ */
-static inline void cache_barrier_icache(void)
-{
-	cache_op_all(COP_OP_BARRIER_ICACHE);
-}
-
-/* invalidate all I$ */
-static inline void cache_invalidate_icache(void)
-{
-	cache_op_all(COP_OP_INVALIDATE_ICACHE);
-}
-
-/* invalidate a range of I$ */
-static inline int cache_invalidate_icache_range(uintptr_t addr, uint32_t length)
-{
-	return cache_op_addr(addr, length, COP_OP_INVALIDATE_ICACHE_ADDR);
-}
-
-/* memory barrier of D$ */
-static inline void cache_barrier_dcache(void)
-{
-	cache_op_all(COP_OP_BARRIER_DCACHE);
-}
-
-/* writeback all D$ */
-static inline void cache_writeback_dcache(void)
-{
-	cache_op_all(COP_OP_WRITEBACK_DCACHE);
-	cache_barrier_icache();
-	cache_barrier_dcache();
-}
-
-/* writeback a range of D$ */
-static inline int cache_writeback_dcache_range(uintptr_t addr, uint32_t length)
-{
-	int ret = cache_op_addr(addr, length, COP_OP_WRITEBACK_DCACHE_ADDR);
-	cache_barrier_icache();
-	cache_barrier_dcache();
-	return ret;
-}
-
-/* invalidate all D$ */
-static inline void cache_invalidate_dcache(void)
-{
-	cache_op_all(COP_OP_INVALIDATE_DCACHE);
-}
-
-/* invalidate a range of D$ */
-static inline int cache_invalidate_dcache_range(uintptr_t addr, uint32_t length)
-{
-	return cache_op_addr(addr, length, COP_OP_INVALIDATE_DCACHE_ADDR);
-}
-
-/* writeback and invalidate all D$ */
-static inline void cache_flush_dcache(void)
-{
-	cache_op_all(COP_OP_FLUSH_DCACHE);
-	cache_barrier_icache();
-	cache_barrier_dcache();
-}
-
-/* writeback and invalidate a range of D$ */
-static inline int cache_flush_dcache_range(uintptr_t addr, uint32_t length)
-{
-	int ret = cache_op_addr(addr, length, COP_OP_FLUSH_DCACHE_ADDR);
-	cache_barrier_icache();
-	cache_barrier_dcache();
-	return ret;
-}
-
-struct mpu_entry {
-	/* 1k alignment and the address is inclusive */
-	uintptr_t start_addr;
-	/* 1k alignment in 4GB boundary and non-inclusive */
-	uintptr_t end_addr;
-	/* MPU_ATTR */
-	uint32_t attribute;
-};
-
-void cache_init(void);
-
-#ifdef DEBUG
-int command_enable_pmu(int argc, char **argv);
-int command_disable_pmu(int argc, char **argv);
-int command_show_pmu(int argc, char **argv);
-#endif
-
-#endif /* #ifndef __CROS_EC_CACHE_H */
diff --git a/chip/mt_scp/rv32i_common/config_chip.h b/chip/mt_scp/rv32i_common/config_chip.h
deleted file mode 100644
index ac53d51732..0000000000
--- a/chip/mt_scp/rv32i_common/config_chip.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef __CROS_EC_CONFIG_CHIP_H
-#define __CROS_EC_CONFIG_CHIP_H
-
-#include "core/riscv-rv32i/config_core.h"
-
-/* Interval between HOOK_TICK notifications */
-#define HOOK_TICK_INTERVAL_MS 500
-#define HOOK_TICK_INTERVAL    (HOOK_TICK_INTERVAL_MS * MSEC)
-
-/* RW only, no flash */
-#undef  CONFIG_FW_INCLUDE_RO
-#define CONFIG_RO_MEM_OFF 0
-#define CONFIG_RO_SIZE 0
-#define CONFIG_RW_MEM_OFF 0
-#define CONFIG_RW_SIZE 0x40000 /* 256KB */
-#define CONFIG_EC_WRITABLE_STORAGE_OFF 0
-#define CONFIG_EC_PROTECTED_STORAGE_OFF 0
-#define CONFIG_RO_STORAGE_OFF 0
-#define CONFIG_RW_STORAGE_OFF 0
-#define CONFIG_PROGRAM_MEMORY_BASE 0
-#define CONFIG_PROGRAM_MEMORY_BASE_LOAD 0x10500000
-#define CONFIG_MAPPED_STORAGE_BASE 0
-
-/* Unsupported features/commands */
-#undef CONFIG_CMD_FLASHINFO
-#undef CONFIG_CMD_POWER_AP
-#undef CONFIG_FLASH_CROS
-#undef CONFIG_FLASH_PHYSICAL
-#undef CONFIG_FMAP
-#undef CONFIG_HIBERNATE
-#undef CONFIG_LID_SWITCH
-
-/* Task stack size */
-#define CONFIG_STACK_SIZE 1024
-#define IDLE_TASK_STACK_SIZE 640
-#define SMALLER_TASK_STACK_SIZE 384
-#define TASK_STACK_SIZE 488
-#define LARGER_TASK_STACK_SIZE 640
-#define VENTI_TASK_STACK_SIZE 768
-#define ULTRA_TASK_STACK_SIZE 1056
-#define TRENTA_TASK_STACK_SIZE 1184
-
-/* TODO: need to confirm, placeholder */
-#define GPIO_PIN(num) ((num) / 32), ((num) % 32)
-#define GPIO_PIN_MASK(p, m) .port = (p), .mask = (m)
-#undef CONFIG_TASK_PROFILING
-/* TODO: not yet supported */
-#undef CONFIG_MPU
-/* TODO: core/riscv-rv32i pollution */
-#define __ram_code
-
-#endif /* __CROS_EC_CONFIG_CHIP_H */
diff --git a/chip/mt_scp/rv32i_common/csr.h b/chip/mt_scp/rv32i_common/csr.h
deleted file mode 100644
index 7c767d0592..0000000000
--- a/chip/mt_scp/rv32i_common/csr.h
+++ /dev/null
@@ -1,111 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* Control and status register */
-
-/* TODO: move to core/riscv-rv32i? */
-
-#ifndef __CROS_EC_CSR_H
-#define __CROS_EC_CSR_H
-
-#include "common.h"
-
-static inline uint32_t read_csr(uint32_t reg)
-{
-	uint32_t val;
-
-	asm volatile("csrr %0, %1" : "=r"(val) : "i"(reg));
-	return val;
-}
-
-static inline void write_csr(uint32_t reg, uint32_t val)
-{
-	asm volatile ("csrw %0, %1" :: "i"(reg), "r"(val));
-}
-
-static inline uint32_t set_csr(uint32_t reg, uint32_t bit)
-{
-	uint32_t val;
-
-	asm volatile ("csrrs %0, %1, %2" : "=r"(val) : "i"(reg), "r"(bit));
-	return val;
-}
-
-static inline uint32_t clear_csr(uint32_t reg, uint32_t bit)
-{
-	uint32_t val;
-
-	asm volatile ("csrrc %0, %1, %2" : "=r"(val) : "i"(reg), "r"(bit));
-	return val;
-}
-
-/* VIC */
-#define CSR_VIC_MICAUSE		(0x5c0)
-#define CSR_VIC_MIEMS		(0x5c2)
-#define CSR_VIC_MIPEND_G0	(0x5d0)
-#define CSR_VIC_MIMASK_G0	(0x5d8)
-#define CSR_VIC_MIWAKEUP_G0	(0x5e0)
-#define CSR_VIC_MILSEL_G0	(0x5e8)
-#define CSR_VIC_MIEMASK_G0	(0x5f0)
-
-/* centralized control enable */
-#define CSR_MCTREN		(0x7c0)
-/* I$, D$, ITCM, DTCM, BTB, RAS, VIC, CG, mpu */
-#define   CSR_MCTREN_ICACHE	BIT(0)
-#define   CSR_MCTREN_DCACHE	BIT(1)
-#define   CSR_MCTREN_ITCM	BIT(2)
-#define   CSR_MCTREN_DTCM	BIT(3)
-#define   CSR_MCTREN_BTB	BIT(4)
-#define   CSR_MCTREN_RAS	BIT(5)
-#define   CSR_MCTREN_VIC	BIT(6)
-#define   CSR_MCTREN_CG		BIT(7)
-#define   CSR_MCTREN_MPU	BIT(8)
-
-/* MPU */
-#define CSR_MPU_ENTRY_EN	(0x9c0)
-#define CSR_MPU_LITCM		(0x9dc)
-#define CSR_MPU_LDTCM		(0x9dd)
-#define CSR_MPU_HITCM		(0x9de)
-#define CSR_MPU_HDTCM		(0x9df)
-#define CSR_MPU_L(n)		(0x9e0 + (n))
-#define CSR_MPU_H(n)		(0x9f0 + (n))
-/* MPU attributes: set if permitted */
-/* Privilege, machine mode in RISC-V.  We don't use the flag because
- * we don't separate user / machine mode in EC OS. */
-#define   MPU_ATTR_P		BIT(5)
-/* Readable */
-#define   MPU_ATTR_R		BIT(6)
-/* Writable */
-#define   MPU_ATTR_W		BIT(7)
-/* Cacheable */
-#define   MPU_ATTR_C		BIT(8)
-/* Bufferable */
-#define   MPU_ATTR_B		BIT(9)
-
-/* PMU */
-#define CSR_PMU_MPMUCTR		(0xbc0)
-#define   CSR_PMU_MPMUCTR_C	BIT(0)
-#define   CSR_PMU_MPMUCTR_I	BIT(1)
-#define   CSR_PMU_MPMUCTR_H3	BIT(2)
-#define   CSR_PMU_MPMUCTR_H4	BIT(3)
-#define   CSR_PMU_MPMUCTR_H5	BIT(4)
-
-#define CSR_PMU_MCYCLE		(0xb00)
-#define CSR_PMU_MINSTRET	(0xb02)
-#define CSR_PMU_MHPMCOUNTER3	(0xb03)
-#define CSR_PMU_MHPMCOUNTER4	(0xb04)
-#define CSR_PMU_MHPMCOUNTER5	(0xb05)
-
-#define CSR_PMU_MCYCLEH		(0xb80)
-#define CSR_PMU_MINSTRETH	(0xb82)
-#define CSR_PMU_MHPMCOUNTER3H	(0xb83)
-#define CSR_PMU_MHPMCOUNTER4H	(0xb84)
-#define CSR_PMU_MHPMCOUNTER5H	(0xb85)
-
-#define CSR_PMU_MHPMEVENT3	(0x323)
-#define CSR_PMU_MHPMEVENT4	(0x324)
-#define CSR_PMU_MHPMEVENT5	(0x325)
-
-#endif /* __CROS_EC_CSR_H */
diff --git a/chip/mt_scp/rv32i_common/gpio.c b/chip/mt_scp/rv32i_common/gpio.c
deleted file mode 100644
index 0ca3e3ac25..0000000000
--- a/chip/mt_scp/rv32i_common/gpio.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* GPIO module */
-
-#include "gpio.h"
-
-void gpio_pre_init(void)
-{
-}
-
-test_mockable int gpio_get_level(enum gpio_signal signal)
-{
-	return 0;
-}
-
-void gpio_set_level(enum gpio_signal signal, int value)
-{
-}
diff --git a/chip/mt_scp/rv32i_common/hostcmd.c b/chip/mt_scp/rv32i_common/hostcmd.c
deleted file mode 100644
index 42a463ee56..0000000000
--- a/chip/mt_scp/rv32i_common/hostcmd.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "console.h"
-#include "host_command.h"
-#include "ipi_chip.h"
-#include "util.h"
-
-#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args)
-#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args)
-
-#define HOSTCMD_MAX_REQUEST_SIZE CONFIG_IPC_SHARED_OBJ_BUF_SIZE
-/* Reserve 1 extra byte for HOSTCMD_TYPE and 3 bytes for padding. */
-#define HOSTCMD_MAX_RESPONSE_SIZE (CONFIG_IPC_SHARED_OBJ_BUF_SIZE - 4)
-#define HOSTCMD_TYPE_HOSTCMD 1
-#define HOSTCMD_TYPE_HOSTEVENT 2
-
-/*
- * hostcmd and hostevent share the same IPI ID, and use first byte type to
- * indicate its type.
- */
-static struct hostcmd_data {
-	const uint8_t type;
-	/* To be compatible with CONFIG_HOSTCMD_ALIGNED */
-	uint8_t response[HOSTCMD_MAX_RESPONSE_SIZE] __aligned(4);
-} hc_cmd_obj = { .type = HOSTCMD_TYPE_HOSTCMD };
-BUILD_ASSERT(sizeof(struct hostcmd_data) == CONFIG_IPC_SHARED_OBJ_BUF_SIZE);
-
-/* Size of the rpmsg device name, should sync across kernel and EC. */
-#define RPMSG_NAME_SIZE 32
-
-/*
- * The layout of name service message.
- * This should sync across kernel and EC.
- */
-struct rpmsg_ns_msg {
-	/* Name of the corresponding rpmsg_driver. */
-	char name[RPMSG_NAME_SIZE];
-	/* IPC ID */
-	uint32_t addr;
-};
-
-static void hostcmd_send_response_packet(struct host_packet *pkt)
-{
-	int ret;
-
-	ret = ipi_send(SCP_IPI_HOST_COMMAND, &hc_cmd_obj,
-		       pkt->response_size +
-			       offsetof(struct hostcmd_data, response),
-		       1);
-	if (ret)
-		CPRINTS("failed to %s(), ret=%d", __func__, ret);
-}
-
-static void hostcmd_handler(int32_t id, void *buf, uint32_t len)
-{
-	static struct host_packet packet;
-	uint8_t *in_msg = buf;
-	struct ec_host_request *r = (struct ec_host_request *)in_msg;
-	int i;
-
-	if (in_msg[0] != EC_HOST_REQUEST_VERSION) {
-		CPRINTS("ERROR: Protocol V2 is not supported!");
-		CPRINTF("in_msg=[");
-		for (i = 0; i < len; i++)
-			CPRINTF("%02x ", in_msg[i]);
-		CPRINTF("]\n");
-		return;
-	}
-
-	/* Protocol version 3 */
-
-	packet.send_response = hostcmd_send_response_packet;
-
-	/*
-	 * Just assign the buffer to request, host_packet_receive
-	 * handles the buffer copy.
-	 */
-	packet.request = (void *)r;
-	packet.request_temp = NULL;
-	packet.request_max = HOSTCMD_MAX_REQUEST_SIZE;
-	packet.request_size = host_request_expected_size(r);
-
-	packet.response = hc_cmd_obj.response;
-	/* Reserve space for the preamble and trailing byte */
-	packet.response_max = HOSTCMD_MAX_RESPONSE_SIZE;
-	packet.response_size = 0;
-
-	packet.driver_result = EC_RES_SUCCESS;
-
-	host_packet_receive(&packet);
-}
-DECLARE_IPI(SCP_IPI_HOST_COMMAND, hostcmd_handler, 0);
-
-/*
- * Get protocol information
- */
-static enum ec_status hostcmd_get_protocol_info(struct host_cmd_handler_args *args)
-{
-	struct ec_response_get_protocol_info *r = args->response;
-
-	memset(r, 0, sizeof(*r));
-	r->protocol_versions |= BIT(3);
-	r->max_request_packet_size = HOSTCMD_MAX_REQUEST_SIZE;
-	r->max_response_packet_size = HOSTCMD_MAX_RESPONSE_SIZE;
-
-	args->response_size = sizeof(*r);
-
-	return EC_SUCCESS;
-}
-DECLARE_HOST_COMMAND(EC_CMD_GET_PROTOCOL_INFO, hostcmd_get_protocol_info,
-		     EC_VER_MASK(0));
-
-void hostcmd_init(void)
-{
-	int ret;
-	struct rpmsg_ns_msg ns_msg;
-
-	if (IS_ENABLED(CONFIG_RPMSG_NAME_SERVICE)) {
-		ns_msg.addr = SCP_IPI_HOST_COMMAND;
-		strncpy(ns_msg.name, "cros-ec-rpmsg", RPMSG_NAME_SIZE);
-		ret = ipi_send(SCP_IPI_NS_SERVICE, &ns_msg, sizeof(ns_msg), 1);
-		if (ret)
-			CPRINTS("Failed to announce host command channel");
-	}
-}
diff --git a/chip/mt_scp/rv32i_common/hostcmd.h b/chip/mt_scp/rv32i_common/hostcmd.h
deleted file mode 100644
index b93f1e725d..0000000000
--- a/chip/mt_scp/rv32i_common/hostcmd.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef __CROS_EC_HOSTCMD_H
-#define __CROS_EC_HOSTCMD_H
-
-/* Initialize hostcmd. */
-void hostcmd_init(void);
-
-#endif /* __CROS_EC_HOSTCMD_H */
diff --git a/chip/mt_scp/rv32i_common/hrtimer.c b/chip/mt_scp/rv32i_common/hrtimer.c
deleted file mode 100644
index 89ffaa2fca..0000000000
--- a/chip/mt_scp/rv32i_common/hrtimer.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * High-res hardware timer
- *
- * SCP hardware 32bit count down timer can be configured to source clock from
- * 32KHz, 26MHz, BCLK or PCLK. This implementation selects BCLK (ULPOSC1/8) as a
- * source, countdown mode and converts to micro second value matching common
- * timer.
- */
-
-#include "common.h"
-#include "hwtimer.h"
-#include "registers.h"
-#include "task.h"
-
-#define TIMER_SYSTEM 5
-#define TIMER_EVENT 3
-#define TIMER_CLOCK_MHZ 32.5
-#define OVERFLOW_TICKS (TIMER_CLOCK_MHZ * 0x100000000 - 1)
-
-/* High 32-bit for system timer. */
-static uint8_t sys_high;
-/* High 32-bit for event timer. */
-static uint8_t event_high;
-
-static void timer_enable(int n)
-{
-	/* cannot be changed when timer is enabled */
-	SCP_CORE0_TIMER_IRQ_CTRL(n) |= TIMER_IRQ_EN;
-	SCP_CORE0_TIMER_EN(n) |= TIMER_EN;
-}
-
-static void timer_disable(int n)
-{
-	SCP_CORE0_TIMER_EN(n) &= ~TIMER_EN;
-	/* cannot be changed when timer is enabled */
-	SCP_CORE0_TIMER_IRQ_CTRL(n) &= ~TIMER_IRQ_EN;
-}
-
-static int timer_is_irq(int n)
-{
-	return SCP_CORE0_TIMER_IRQ_CTRL(n) & TIMER_IRQ_STATUS;
-}
-
-static void timer_ack_irq(int n)
-{
-	SCP_CORE0_TIMER_IRQ_CTRL(n) |= TIMER_IRQ_CLR;
-}
-
-static void timer_set_reset_value(int n, uint32_t reset_value)
-{
-	/* cannot be changed when timer is enabled */
-	SCP_CORE0_TIMER_RST_VAL(n) = reset_value;
-}
-
-static void timer_set_clock(int n, uint32_t clock_source)
-{
-	SCP_CORE0_TIMER_EN(n) =
-		(SCP_CORE0_TIMER_EN(n) & ~TIMER_CLK_SRC_MASK) | clock_source;
-}
-
-static void timer_reset(int n)
-{
-	timer_disable(n);
-	timer_ack_irq(n);
-	timer_set_reset_value(n, 0xffffffff);
-	timer_set_clock(n, TIMER_CLK_SRC_32K);
-}
-
-/* Convert hardware countdown timer to 64bit countup ticks. */
-static uint64_t timer_read_raw_system(void)
-{
-	uint32_t timer_ctrl = SCP_CORE0_TIMER_IRQ_CTRL(TIMER_SYSTEM);
-	uint32_t sys_high_adj = sys_high;
-
-	/*
-	 * If an IRQ is pending, but has not been serviced yet, adjust the
-	 * sys_high value.
-	 */
-	if (timer_ctrl & TIMER_IRQ_STATUS)
-		sys_high_adj = sys_high ? (sys_high - 1)
-					: (TIMER_CLOCK_MHZ - 1);
-
-	return OVERFLOW_TICKS - (((uint64_t)sys_high_adj << 32) |
-				 SCP_CORE0_TIMER_CUR_VAL(TIMER_SYSTEM));
-}
-
-static uint64_t timer_read_raw_event(void)
-{
-	return OVERFLOW_TICKS - (((uint64_t)event_high << 32) |
-				 SCP_CORE0_TIMER_CUR_VAL(TIMER_EVENT));
-}
-
-static void timer_reload(int n, uint32_t value)
-{
-	timer_disable(n);
-	timer_set_reset_value(n, value);
-	timer_enable(n);
-}
-
-static int timer_reload_event_high(void)
-{
-	if (event_high) {
-		if (SCP_CORE0_TIMER_RST_VAL(TIMER_EVENT) == 0xffffffff)
-			timer_enable(TIMER_EVENT);
-		else
-			timer_reload(TIMER_EVENT, 0xffffffff);
-		event_high--;
-		return 1;
-	}
-
-	timer_disable(TIMER_EVENT);
-	return 0;
-}
-
-int __hw_clock_source_init(uint32_t start_t)
-{
-	int t;
-
-	/* enable clock gate */
-	SCP_SET_CLK_CG |= CG_TIMER_MCLK | CG_TIMER_BCLK;
-
-	/* reset all timer, select 32768Hz clock source */
-	for (t = 0; t < NUM_TIMERS; ++t)
-		timer_reset(t);
-
-	/* System timestamp timer */
-	timer_set_clock(TIMER_SYSTEM, TIMER_CLK_SRC_BCLK);
-	sys_high = TIMER_CLOCK_MHZ - 1;
-	timer_set_reset_value(TIMER_SYSTEM, 0xffffffff);
-	task_enable_irq(SCP_IRQ_TIMER(TIMER_SYSTEM));
-	timer_enable(TIMER_SYSTEM);
-
-	/* Event tick timer */
-	timer_set_clock(TIMER_EVENT, TIMER_CLK_SRC_BCLK);
-	task_enable_irq(SCP_IRQ_TIMER(TIMER_EVENT));
-
-	return SCP_IRQ_TIMER(TIMER_SYSTEM);
-}
-
-uint32_t __hw_clock_source_read(void)
-{
-	return timer_read_raw_system() / TIMER_CLOCK_MHZ;
-}
-
-uint32_t __hw_clock_event_get(void)
-{
-	return (timer_read_raw_event() + timer_read_raw_system())
-			/ TIMER_CLOCK_MHZ;
-}
-
-void __hw_clock_event_clear(void)
-{
-	/* c1ea4, magic number for clear state */
-	timer_disable(TIMER_EVENT);
-	timer_set_reset_value(TIMER_EVENT, 0x0000c1ea4);
-	event_high = 0;
-}
-
-void __hw_clock_event_set(uint32_t deadline)
-{
-	uint64_t deadline_raw = (uint64_t)deadline * TIMER_CLOCK_MHZ;
-	uint64_t now_raw = timer_read_raw_system();
-	uint32_t event_deadline;
-
-	if (deadline_raw > now_raw) {
-		deadline_raw -= now_raw;
-		event_deadline = (uint32_t)deadline_raw;
-		event_high = deadline_raw >> 32;
-	} else {
-		event_deadline = 1;
-		event_high = 0;
-	}
-
-	if (event_deadline)
-		timer_reload(TIMER_EVENT, event_deadline);
-	else
-		timer_reload_event_high();
-}
-
-static void irq_group6_handler(void)
-{
-	extern volatile int ec_int;
-
-	switch (ec_int) {
-	case SCP_IRQ_TIMER(TIMER_EVENT):
-		if (timer_is_irq(TIMER_EVENT)) {
-			timer_ack_irq(TIMER_EVENT);
-
-			if (!timer_reload_event_high())
-				process_timers(0);
-
-			task_clear_pending_irq(ec_int);
-		}
-		break;
-	case SCP_IRQ_TIMER(TIMER_SYSTEM):
-		/* If this is a hardware irq, check overflow */
-		if (!in_soft_interrupt_context()) {
-			timer_ack_irq(TIMER_SYSTEM);
-
-			if (sys_high) {
-				--sys_high;
-				process_timers(0);
-			} else {
-				/* Overflow, reload system timer */
-				sys_high = TIMER_CLOCK_MHZ - 1;
-				process_timers(1);
-			}
-
-			task_clear_pending_irq(ec_int);
-		} else {
-			process_timers(0);
-		}
-		break;
-	}
-}
-DECLARE_IRQ(6, irq_group6_handler, 0);
diff --git a/chip/mt_scp/rv32i_common/intc.c b/chip/mt_scp/rv32i_common/intc.c
deleted file mode 100644
index 7e6b39e1f2..0000000000
--- a/chip/mt_scp/rv32i_common/intc.c
+++ /dev/null
@@ -1,422 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* INTC control module */
-
-#include "console.h"
-#include "csr.h"
-#include "intc.h"
-#include "registers.h"
-
-/*
- * INTC_GRP_0 is reserved.  See swirq of syscall_handler() in
- * core/riscv-rv32i/task.c for more details.
- *
- * Lower group has higher priority.  Group 0 has highest priority.
- */
-enum INTC_GROUP {
-	INTC_GRP_0 = 0x0,
-	INTC_GRP_1,
-	INTC_GRP_2,
-	INTC_GRP_3,
-	INTC_GRP_4,
-	INTC_GRP_5,
-	INTC_GRP_6,
-	INTC_GRP_7,
-	INTC_GRP_8,
-	INTC_GRP_9,
-	INTC_GRP_10,
-	INTC_GRP_11,
-	INTC_GRP_12,
-	INTC_GRP_13,
-	INTC_GRP_14,
-};
-
-#ifdef BOARD_ASURADA_SCP
-static struct {
-	uint8_t group;
-} irqs[SCP_INTC_IRQ_COUNT] = {
-	/* 0 */
-	[SCP_IRQ_GIPC_IN0]		= { INTC_GRP_7 },
-	[SCP_IRQ_GIPC_IN1]		= { INTC_GRP_0 },
-	[SCP_IRQ_GIPC_IN2]		= { INTC_GRP_0 },
-	[SCP_IRQ_GIPC_IN3]		= { INTC_GRP_0 },
-	/* 4 */
-	[SCP_IRQ_SPM]			= { INTC_GRP_0 },
-	[SCP_IRQ_AP_CIRQ]		= { INTC_GRP_0 },
-	[SCP_IRQ_EINT]			= { INTC_GRP_0 },
-	[SCP_IRQ_PMIC]			= { INTC_GRP_0 },
-	/* 8 */
-	[SCP_IRQ_UART0_TX]		= { INTC_GRP_12 },
-	[SCP_IRQ_UART1_TX]		= { INTC_GRP_12 },
-	[SCP_IRQ_I2C0]			= { INTC_GRP_0 },
-	[SCP_IRQ_I2C1_0]		= { INTC_GRP_0 },
-	/* 12 */
-	[SCP_IRQ_BUS_DBG_TRACKER]	= { INTC_GRP_0 },
-	[SCP_IRQ_CLK_CTRL]		= { INTC_GRP_0 },
-	[SCP_IRQ_VOW]			= { INTC_GRP_0 },
-	[SCP_IRQ_TIMER0]		= { INTC_GRP_6 },
-	/* 16 */
-	[SCP_IRQ_TIMER1]		= { INTC_GRP_6 },
-	[SCP_IRQ_TIMER2]		= { INTC_GRP_6 },
-	[SCP_IRQ_TIMER3]		= { INTC_GRP_6 },
-	[SCP_IRQ_TIMER4]		= { INTC_GRP_6 },
-	/* 20 */
-	[SCP_IRQ_TIMER5]		= { INTC_GRP_6 },
-	[SCP_IRQ_OS_TIMER]		= { INTC_GRP_0 },
-	[SCP_IRQ_UART0_RX]		= { INTC_GRP_12 },
-	[SCP_IRQ_UART1_RX]		= { INTC_GRP_12 },
-	/* 24 */
-	[SCP_IRQ_GDMA]			= { INTC_GRP_0 },
-	[SCP_IRQ_AUDIO]			= { INTC_GRP_0 },
-	[SCP_IRQ_MD_DSP]		= { INTC_GRP_0 },
-	[SCP_IRQ_ADSP]			= { INTC_GRP_0 },
-	/* 28 */
-	[SCP_IRQ_CPU_TICK]		= { INTC_GRP_0 },
-	[SCP_IRQ_SPI0]			= { INTC_GRP_0 },
-	[SCP_IRQ_SPI1]			= { INTC_GRP_0 },
-	[SCP_IRQ_SPI2]			= { INTC_GRP_0 },
-	/* 32 */
-	[SCP_IRQ_NEW_INFRA_SYS_CIRQ]	= { INTC_GRP_0 },
-	[SCP_IRQ_DBG]			= { INTC_GRP_0 },
-	[SCP_IRQ_CCIF0]			= { INTC_GRP_0 },
-	[SCP_IRQ_CCIF1]			= { INTC_GRP_0 },
-	/* 36 */
-	[SCP_IRQ_CCIF2]			= { INTC_GRP_0 },
-	[SCP_IRQ_WDT]			= { INTC_GRP_0 },
-	[SCP_IRQ_USB0]			= { INTC_GRP_0 },
-	[SCP_IRQ_USB1]			= { INTC_GRP_0 },
-	/* 40 */
-	[SCP_IRQ_DPMAIF]		= { INTC_GRP_0 },
-	[SCP_IRQ_INFRA]			= { INTC_GRP_0 },
-	[SCP_IRQ_CLK_CTRL_CORE]		= { INTC_GRP_0 },
-	[SCP_IRQ_CLK_CTRL2_CORE]	= { INTC_GRP_0 },
-	/* 44 */
-	[SCP_IRQ_CLK_CTRL2]		= { INTC_GRP_0 },
-	[SCP_IRQ_GIPC_IN4]		= { INTC_GRP_0 },
-	[SCP_IRQ_PERIBUS_TIMEOUT]	= { INTC_GRP_0 },
-	[SCP_IRQ_INFRABUS_TIMEOUT]	= { INTC_GRP_0 },
-	/* 48 */
-	[SCP_IRQ_MET0]			= { INTC_GRP_0 },
-	[SCP_IRQ_MET1]			= { INTC_GRP_0 },
-	[SCP_IRQ_MET2]			= { INTC_GRP_0 },
-	[SCP_IRQ_MET3]			= { INTC_GRP_0 },
-	/* 52 */
-	[SCP_IRQ_AP_WDT]		= { INTC_GRP_0 },
-	[SCP_IRQ_L2TCM_SEC_VIO]		= { INTC_GRP_0 },
-	[SCP_IRQ_CPU_TICK1]		= { INTC_GRP_0 },
-	[SCP_IRQ_MAD_DATAIN]		= { INTC_GRP_0 },
-	/* 56 */
-	[SCP_IRQ_I3C0_IBI_WAKE]		= { INTC_GRP_0 },
-	[SCP_IRQ_I3C1_IBI_WAKE]		= { INTC_GRP_0 },
-	[SCP_IRQ_I3C2_IBI_WAKE]		= { INTC_GRP_0 },
-	[SCP_IRQ_APU_ENGINE]		= { INTC_GRP_0 },
-	/* 60 */
-	[SCP_IRQ_MBOX0]			= { INTC_GRP_0 },
-	[SCP_IRQ_MBOX1]			= { INTC_GRP_0 },
-	[SCP_IRQ_MBOX2]			= { INTC_GRP_0 },
-	[SCP_IRQ_MBOX3]			= { INTC_GRP_0 },
-	/* 64 */
-	[SCP_IRQ_MBOX4]			= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_CLK_REQ]		= { INTC_GRP_0 },
-	[SCP_IRQ_BUS_REQ]		= { INTC_GRP_0 },
-	[SCP_IRQ_APSRC_REQ]		= { INTC_GRP_0 },
-	/* 68 */
-	[SCP_IRQ_APU_MBOX]		= { INTC_GRP_0 },
-	[SCP_IRQ_DEVAPC_SECURE_VIO]	= { INTC_GRP_0 },
-	/* 72 */
-	/* 76 */
-	[SCP_IRQ_I2C1_2]		= { INTC_GRP_0 },
-	[SCP_IRQ_I2C2]			= { INTC_GRP_0 },
-	/* 80 */
-	[SCP_IRQ_AUD2AUDIODSP]		= { INTC_GRP_0 },
-	[SCP_IRQ_AUD2AUDIODSP_2]	= { INTC_GRP_0 },
-	[SCP_IRQ_CONN2ADSP_A2DPOL]	= { INTC_GRP_0 },
-	[SCP_IRQ_CONN2ADSP_BTCVSD]	= { INTC_GRP_0 },
-	/* 84 */
-	[SCP_IRQ_CONN2ADSP_BLEISO]	= { INTC_GRP_0 },
-	[SCP_IRQ_PCIE2ADSP]		= { INTC_GRP_0 },
-	[SCP_IRQ_APU2ADSP_ENGINE]	= { INTC_GRP_0 },
-	[SCP_IRQ_APU2ADSP_MBOX]		= { INTC_GRP_0 },
-	/* 88 */
-	[SCP_IRQ_CCIF3]			= { INTC_GRP_0 },
-	[SCP_IRQ_I2C_DMA0]		= { INTC_GRP_0 },
-	[SCP_IRQ_I2C_DMA1]		= { INTC_GRP_0 },
-	[SCP_IRQ_I2C_DMA2]		= { INTC_GRP_0 },
-	/* 92 */
-	[SCP_IRQ_I2C_DMA3]		= { INTC_GRP_0 },
-};
-BUILD_ASSERT(ARRAY_SIZE(irqs) == SCP_INTC_IRQ_COUNT);
-#endif
-
-#ifdef BOARD_CHERRY_SCP
-static struct {
-	uint8_t group;
-} irqs[SCP_INTC_IRQ_COUNT] = {
-	/* 0 */
-	[SCP_IRQ_GIPC_IN0]		= { INTC_GRP_7 },
-	[SCP_IRQ_GIPC_IN1]		= { INTC_GRP_0 },
-	[SCP_IRQ_GIPC_IN2]		= { INTC_GRP_0 },
-	[SCP_IRQ_GIPC_IN3]		= { INTC_GRP_0 },
-	/* 4 */
-	[SCP_IRQ_SPM]			= { INTC_GRP_0 },
-	[SCP_IRQ_AP_CIRQ]		= { INTC_GRP_0 },
-	[SCP_IRQ_EINT]			= { INTC_GRP_0 },
-	[SCP_IRQ_PMIC]			= { INTC_GRP_0 },
-	/* 8 */
-	[SCP_IRQ_UART0_TX]		= { INTC_GRP_12 },
-	[SCP_IRQ_UART1_TX]		= { INTC_GRP_12 },
-	[SCP_IRQ_I2C0]			= { INTC_GRP_0 },
-	[SCP_IRQ_I2C1_0]		= { INTC_GRP_0 },
-	/* 12 */
-	[SCP_IRQ_BUS_DBG_TRACKER]	= { INTC_GRP_0 },
-	[SCP_IRQ_CLK_CTRL]		= { INTC_GRP_0 },
-	[SCP_IRQ_VOW]			= { INTC_GRP_0 },
-	[SCP_IRQ_TIMER0]		= { INTC_GRP_6 },
-	/* 16 */
-	[SCP_IRQ_TIMER1]		= { INTC_GRP_6 },
-	[SCP_IRQ_TIMER2]		= { INTC_GRP_6 },
-	[SCP_IRQ_TIMER3]		= { INTC_GRP_6 },
-	[SCP_IRQ_TIMER4]		= { INTC_GRP_6 },
-	/* 20 */
-	[SCP_IRQ_TIMER5]		= { INTC_GRP_6 },
-	[SCP_IRQ_OS_TIMER]		= { INTC_GRP_0 },
-	[SCP_IRQ_UART0_RX]		= { INTC_GRP_12 },
-	[SCP_IRQ_UART1_RX]		= { INTC_GRP_12 },
-	/* 24 */
-	[SCP_IRQ_GDMA]			= { INTC_GRP_0 },
-	[SCP_IRQ_AUDIO]			= { INTC_GRP_0 },
-	[SCP_IRQ_MD_DSP]		= { INTC_GRP_0 },
-	[SCP_IRQ_ADSP]			= { INTC_GRP_0 },
-	/* 28 */
-	[SCP_IRQ_CPU_TICK]		= { INTC_GRP_0 },
-	[SCP_IRQ_SPI0]			= { INTC_GRP_0 },
-	[SCP_IRQ_SPI1]			= { INTC_GRP_0 },
-	[SCP_IRQ_SPI2]			= { INTC_GRP_0 },
-	/* 32 */
-	[SCP_IRQ_NEW_INFRA_SYS_CIRQ]	= { INTC_GRP_0 },
-	[SCP_IRQ_DBG]			= { INTC_GRP_0 },
-	[SCP_IRQ_GCE]			= { INTC_GRP_0 },
-	[SCP_IRQ_MDP_GCE]		= { INTC_GRP_0 },
-	/* 36 */
-	[SCP_IRQ_VDEC]			= { INTC_GRP_8 },
-	[SCP_IRQ_WDT]			= { INTC_GRP_0 },
-	[SCP_IRQ_VDEC_LAT]		= { INTC_GRP_8 },
-	[SCP_IRQ_VDEC1]			= { INTC_GRP_8 },
-	/* 40 */
-	[SCP_IRQ_VDEC1_LAT]		= { INTC_GRP_8 },
-	[SCP_IRQ_INFRA]			= { INTC_GRP_0 },
-	[SCP_IRQ_CLK_CTRL_CORE]		= { INTC_GRP_0 },
-	[SCP_IRQ_CLK_CTRL2_CORE]	= { INTC_GRP_0 },
-	/* 44 */
-	[SCP_IRQ_CLK_CTRL2]		= { INTC_GRP_0 },
-	[SCP_IRQ_GIPC_IN4]		= { INTC_GRP_0 },
-	[SCP_IRQ_PERIBUS_TIMEOUT]	= { INTC_GRP_0 },
-	[SCP_IRQ_INFRABUS_TIMEOUT]	= { INTC_GRP_0 },
-	/* 48 */
-	[SCP_IRQ_MET0]			= { INTC_GRP_0 },
-	[SCP_IRQ_MET1]			= { INTC_GRP_0 },
-	[SCP_IRQ_MET2]			= { INTC_GRP_0 },
-	[SCP_IRQ_MET3]			= { INTC_GRP_0 },
-	/* 52 */
-	[SCP_IRQ_AP_WDT]		= { INTC_GRP_0 },
-	[SCP_IRQ_L2TCM_SEC_VIO]		= { INTC_GRP_0 },
-	[SCP_IRQ_VDEC_INT_LINE_CNT]	= { INTC_GRP_0 },
-	[SCP_IRQ_VOW_DATAIN]		= { INTC_GRP_0 },
-	/* 56 */
-	[SCP_IRQ_I3C0_IBI_WAKE]		= { INTC_GRP_0 },
-	[SCP_IRQ_I3C1_IBI_WAKE]		= { INTC_GRP_0 },
-	[SCP_IRQ_VENC]			= { INTC_GRP_8 },
-	[SCP_IRQ_APU_ENGINE]		= { INTC_GRP_0 },
-	/* 60 */
-	[SCP_IRQ_MBOX0]			= { INTC_GRP_0 },
-	[SCP_IRQ_MBOX1]			= { INTC_GRP_0 },
-	[SCP_IRQ_MBOX2]			= { INTC_GRP_0 },
-	[SCP_IRQ_MBOX3]			= { INTC_GRP_0 },
-	/* 64 */
-	[SCP_IRQ_MBOX4]			= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_CLK_REQ]		= { INTC_GRP_0 },
-	[SCP_IRQ_BUS_REQ]		= { INTC_GRP_0 },
-	[SCP_IRQ_APSRC_REQ]		= { INTC_GRP_0 },
-	/* 68 */
-	[SCP_IRQ_APU_MBOX]		= { INTC_GRP_0 },
-	[SCP_IRQ_DEVAPC_SECURE_VIO]	= { INTC_GRP_0 },
-	[SCP_IRQ_CAMSYS_29]		= { INTC_GRP_0 },
-	[SCP_IRQ_CAMSYS_28]		= { INTC_GRP_0 },
-	/* 72 */
-	[SCP_IRQ_CAMSYS_5]		= { INTC_GRP_0 },
-	[SCP_IRQ_CAMSYS_4]		= { INTC_GRP_0 },
-	[SCP_IRQ_CAMSYS_3]		= { INTC_GRP_0 },
-	[SCP_IRQ_CAMSYS_2]		= { INTC_GRP_0 },
-	/* 76 */
-	[SCP_IRQ_HDMIRX_PM_DVI_SQH]	= { INTC_GRP_0 },
-	[SCP_IRQ_HDMIRX_RESERVED]	= { INTC_GRP_0 },
-	[SCP_IRQ_NNA0_0]		= { INTC_GRP_0 },
-	[SCP_IRQ_NNA0_1]		= { INTC_GRP_0 },
-	/* 80 */
-	[SCP_IRQ_NNA0_2]		= { INTC_GRP_0 },
-	[SCP_IRQ_NNA1_0]		= { INTC_GRP_0 },
-	[SCP_IRQ_NNA1_1]		= { INTC_GRP_0 },
-	[SCP_IRQ_NNA1_2]		= { INTC_GRP_0 },
-	/* 84 */
-	[SCP_IRQ_JPEGENC]		= { INTC_GRP_0 },
-	[SCP_IRQ_JPEGDEC]		= { INTC_GRP_0 },
-	[SCP_IRQ_JPEGDEC_C2]		= { INTC_GRP_0 },
-	[SCP_IRQ_VENC_C1]		= { INTC_GRP_8 },
-	/* 88 */
-	[SCP_IRQ_JPEGENC_C1]		= { INTC_GRP_0 },
-	[SCP_IRQ_JPEGDEC_C1]		= { INTC_GRP_0 },
-	[SCP_IRQ_HDMITX]		= { INTC_GRP_0 },
-	[SCP_IRQ_HDMI2]			= { INTC_GRP_0 },
-	/* 92 */
-	[SCP_IRQ_EARC]			= { INTC_GRP_0 },
-	[SCP_IRQ_HDMI2]			= { INTC_GRP_0 },
-	[SCP_IRQ_HDMI2]			= { INTC_GRP_0 },
-	[SCP_IRQ_HDMI2]			= { INTC_GRP_0 },
-	/* 96 */
-	[SCP_IRQ_I2C2]			= { INTC_GRP_0 },
-	[SCP_IRQ_I2C3]			= { INTC_GRP_0 },
-	[SCP_IRQ_I3C2_IBI_WAKE]		= { INTC_GRP_0 },
-	[SCP_IRQ_I3C3_IBI_WAKE]		= { INTC_GRP_0 },
-	/* 100 */
-	[SCP_IRQ_SYS_I2C_0]		= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_I2C_1]		= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_I2C_2]		= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_I2C_3]		= { INTC_GRP_0 },
-	/* 104 */
-	[SCP_IRQ_SYS_I2C_4]		= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_I2C_5]		= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_I2C_6]		= { INTC_GRP_0 },
-	[SCP_IRQ_SYS_I2C_7]		= { INTC_GRP_0 },
-	/* 108 */
-	[SCP_IRQ_DISP2ADSP_0]		= { INTC_GRP_0 },
-	[SCP_IRQ_DISP2ADSP_1]		= { INTC_GRP_0 },
-	[SCP_IRQ_DISP2ADSP_2]		= { INTC_GRP_0 },
-	[SCP_IRQ_DISP2ADSP_3]		= { INTC_GRP_0 },
-	/* 112 */
-	[SCP_IRQ_DISP2ADSP_4]		= { INTC_GRP_0 },
-	[SCP_IRQ_VDO1_DISP_MON2ADSP_0]	= { INTC_GRP_0 },
-	[SCP_IRQ_VDO1_DISP_MON2ADSP_1]	= { INTC_GRP_0 },
-	[SCP_IRQ_VDO1_DISP_MON2ADSP_2]	= { INTC_GRP_0 },
-	/* 116 */
-	[SCP_IRQ_GCE1_SECURE]		= { INTC_GRP_0 },
-	[SCP_IRQ_GCE_SECURE]		= { INTC_GRP_0 },
-};
-BUILD_ASSERT(ARRAY_SIZE(irqs) == SCP_INTC_IRQ_COUNT);
-#endif
-
-/*
- * Find current interrupt source.
- *
- * Lower group has higher priority.
- * Higher INT number has higher priority.
- */
-int chip_get_ec_int(void)
-{
-	extern volatile int ec_int;
-	unsigned int group, sta;
-	int word;
-
-	if (!SCP_CORE0_INTC_IRQ_OUT)
-		goto error;
-
-	group = read_csr(CSR_VIC_MICAUSE);
-
-	for (word = SCP_INTC_GRP_LEN - 1; word >= 0; --word) {
-		sta = SCP_CORE0_INTC_IRQ_GRP_STA(group, word);
-		if (sta) {
-			ec_int = __fls(sta) + word * 32;
-			return ec_int;
-		}
-	}
-
-error:
-	/* unreachable, SCP crashes and dumps registers after returning */
-	return -1;
-}
-
-int chip_get_intc_group(int irq)
-{
-	return irqs[irq].group;
-}
-
-void chip_enable_irq(int irq)
-{
-	unsigned int word, group, mask;
-
-	word = SCP_INTC_WORD(irq);
-	group = irqs[irq].group;
-	mask = BIT(SCP_INTC_BIT(irq));
-
-	/* disable interrupt */
-	SCP_CORE0_INTC_IRQ_EN(word) &= ~mask;
-	/* set group */
-	SCP_CORE0_INTC_IRQ_GRP(group, word) |= mask;
-	/* set as a wakeup source */
-	SCP_CORE0_INTC_SLP_WAKE_EN(word) |= mask;
-	/* enable interrupt */
-	SCP_CORE0_INTC_IRQ_EN(word) |= mask;
-}
-
-void chip_disable_irq(int irq)
-{
-	/*
-	 * Disabling INTC IRQ in runtime is unstable in MT8192 SCP.
-	 * See b/163682416#comment17.
-	 *
-	 * Ideally, this function will be removed by LTO.
-	 */
-	ccprints("WARNING: %s is unsupported", __func__);
-}
-
-void chip_clear_pending_irq(int irq)
-{
-	unsigned int group = irqs[irq].group;
-
-	/* must clear interrupt source before writing this */
-	write_csr(CSR_VIC_MIEMS, group);
-}
-
-int chip_trigger_irq(int irq)
-{
-	extern volatile int ec_int;
-
-	ec_int = irq;
-	return irqs[irq].group;
-}
-
-void chip_init_irqs(void)
-{
-	unsigned int word, group;
-
-	/* INTC init */
-	/* clear enable and wakeup settings */
-	for (word = 0; word < SCP_INTC_GRP_LEN; ++word) {
-		SCP_CORE0_INTC_IRQ_EN(word) = 0x0;
-		SCP_CORE0_INTC_SLP_WAKE_EN(word) = 0x0;
-
-		/* clear group settings */
-		for (group = 0; group < SCP_INTC_GRP_COUNT; ++group)
-			SCP_CORE0_INTC_IRQ_GRP(group, word) = 0x0;
-	}
-	/* reset to default polarity */
-	SCP_CORE0_INTC_IRQ_POL(0) = SCP_INTC_IRQ_POL0;
-	SCP_CORE0_INTC_IRQ_POL(1) = SCP_INTC_IRQ_POL1;
-	SCP_CORE0_INTC_IRQ_POL(2) = SCP_INTC_IRQ_POL2;
-#if SCP_INTC_GRP_LEN > 3
-	SCP_CORE0_INTC_IRQ_POL(3) = SCP_INTC_IRQ_POL3;
-#endif
-
-	/* GVIC init */
-	/* enable all groups as interrupt sources */
-	write_csr(CSR_VIC_MIMASK_G0, 0xffffffff);
-	/* use level trigger */
-	write_csr(CSR_VIC_MILSEL_G0, 0xffffffff);
-	/* enable all groups as wakeup sources */
-	write_csr(CSR_VIC_MIWAKEUP_G0, 0xffffffff);
-
-	/* enable GVIC */
-	set_csr(CSR_MCTREN, CSR_MCTREN_VIC);
-}
diff --git a/chip/mt_scp/rv32i_common/ipi.c b/chip/mt_scp/rv32i_common/ipi.c
deleted file mode 100644
index cba5c65d0b..0000000000
--- a/chip/mt_scp/rv32i_common/ipi.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "atomic.h"
-#include "cache.h"
-#include "common.h"
-#include "console.h"
-#include "hooks.h"
-#include "hostcmd.h"
-#include "ipi_chip.h"
-#include "registers.h"
-#include "system.h"
-#include "task.h"
-#include "util.h"
-#include "video.h"
-
-#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args)
-#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args)
-
-static uint8_t init_done;
-
-static struct mutex ipi_lock;
-static struct ipc_shared_obj *const ipi_send_buf =
-	(struct ipc_shared_obj *)CONFIG_IPC_SHARED_OBJ_ADDR;
-static struct ipc_shared_obj *const ipi_recv_buf =
-	(struct ipc_shared_obj *)(CONFIG_IPC_SHARED_OBJ_ADDR +
-				  sizeof(struct ipc_shared_obj));
-
-static uint32_t disable_irq_count, saved_int_mask;
-
-void ipi_disable_irq(void)
-{
-	if (atomic_read_add(&disable_irq_count, 1) == 0)
-		saved_int_mask = read_clear_int_mask();
-}
-
-void ipi_enable_irq(void)
-{
-	if (atomic_read_sub(&disable_irq_count, 1) == 1)
-		set_int_mask(saved_int_mask);
-}
-
-static int ipi_is_busy(void)
-{
-	return SCP_SCP2APMCU_IPC_SET & IPC_SCP2HOST;
-}
-
-static void ipi_wake_ap(int32_t id)
-{
-	if (id >= IPI_COUNT)
-		return;
-
-	if (*ipi_wakeup_table[id])
-		SCP_SCP2SPM_IPC_SET = IPC_SCP2HOST;
-}
-
-int ipi_send(int32_t id, const void *buf, uint32_t len, int wait)
-{
-	int ret;
-
-	if (!init_done) {
-		CPRINTS("IPI has not initialized");
-		return EC_ERROR_BUSY;
-	}
-
-	if (in_interrupt_context()) {
-		CPRINTS("invoke %s() in ISR context", __func__);
-		return EC_ERROR_BUSY;
-	}
-
-	if (len > sizeof(ipi_send_buf->buffer)) {
-		CPRINTS("data length exceeds limitation");
-		return EC_ERROR_INVAL;
-	}
-
-	ipi_disable_irq();
-	mutex_lock(&ipi_lock);
-
-	if (ipi_is_busy()) {
-		/*
-		 * If the following conditions meet,
-		 *   1) There is an IPI pending in AP.
-		 *   2) The incoming IPI is a wakeup IPI.
-		 * then it assumes that AP is in suspend state.
-		 * Send a AP wakeup request to SPM.
-		 *
-		 * The incoming IPI will be checked if it's a wakeup source.
-		 */
-		ipi_wake_ap(id);
-
-		CPRINTS("IPI busy, id=%d", id);
-		ret = EC_ERROR_BUSY;
-		goto error;
-	}
-
-	ipi_send_buf->id = id;
-	ipi_send_buf->len = len;
-	memcpy(ipi_send_buf->buffer, buf, len);
-
-	/* flush memory cache (if any) */
-	cache_flush_dcache_range((uintptr_t)ipi_send_buf,
-				 sizeof(*ipi_send_buf));
-
-	/* interrupt AP to handle the message */
-	ipi_wake_ap(id);
-	SCP_SCP2APMCU_IPC_SET = IPC_SCP2HOST;
-
-	if (wait)
-		while (ipi_is_busy())
-			;
-
-	ret = EC_SUCCESS;
-error:
-	mutex_unlock(&ipi_lock);
-	ipi_enable_irq();
-	return ret;
-}
-
-static void ipi_enable_deferred(void)
-{
-	struct scp_run_t scp_run;
-	int ret;
-
-	init_done = 1;
-
-	/* inform AP that SCP is up */
-	scp_run.signaled = 1;
-	strncpy(scp_run.fw_ver, system_get_version(EC_IMAGE_RW),
-		SCP_FW_VERSION_LEN);
-	scp_run.dec_capability = video_get_dec_capability();
-	scp_run.enc_capability = video_get_enc_capability();
-
-	ret = ipi_send(SCP_IPI_INIT, (void *)&scp_run, sizeof(scp_run), 1);
-	if (ret) {
-		CPRINTS("failed to send initialization IPC messages");
-		init_done = 0;
-		return;
-	}
-
-#ifdef HAS_TASK_HOSTCMD
-	hostcmd_init();
-#endif
-
-	task_enable_irq(SCP_IRQ_GIPC_IN0);
-}
-DECLARE_DEFERRED(ipi_enable_deferred);
-
-static void ipi_init(void)
-{
-	memset(ipi_send_buf, 0, sizeof(struct ipc_shared_obj));
-	memset(ipi_recv_buf, 0, sizeof(struct ipc_shared_obj));
-
-	/* enable IRQ after all tasks are up */
-	hook_call_deferred(&ipi_enable_deferred_data, 0);
-}
-DECLARE_HOOK(HOOK_INIT, ipi_init, HOOK_PRIO_DEFAULT);
-
-static void ipi_handler(void)
-{
-	if (ipi_recv_buf->id >= IPI_COUNT) {
-		CPRINTS("invalid IPI, id=%d", ipi_recv_buf->id);
-		return;
-	}
-
-	CPRINTS("IPI %d", ipi_recv_buf->id);
-
-	ipi_handler_table[ipi_recv_buf->id](
-		ipi_recv_buf->id, ipi_recv_buf->buffer, ipi_recv_buf->len);
-}
-
-static void irq_group7_handler(void)
-{
-	extern volatile int ec_int;
-
-	if (SCP_GIPC_IN_SET & GIPC_IN(0)) {
-		ipi_handler();
-		SCP_GIPC_IN_CLR = GIPC_IN(0);
-		asm volatile ("fence.i" ::: "memory");
-		task_clear_pending_irq(ec_int);
-	}
-}
-DECLARE_IRQ(7, irq_group7_handler, 0);
diff --git a/chip/mt_scp/rv32i_common/ipi_chip.h b/chip/mt_scp/rv32i_common/ipi_chip.h
deleted file mode 100644
index 47a9434b09..0000000000
--- a/chip/mt_scp/rv32i_common/ipi_chip.h
+++ /dev/null
@@ -1,86 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef __CROS_EC_IPI_CHIP_H
-#define __CROS_EC_IPI_CHIP_H
-
-#include "common.h"
-
-/*
- * Length of EC version string is at most 32 byte (NULL included), which
- * also aligns SCP fw_version length.
- */
-#define SCP_FW_VERSION_LEN 32
-
-#ifndef SCP_IPI_INIT
-#error If CONFIG_IPI is enabled, SCP_IPI_INIT must be defined.
-#endif
-
-/*
- * Share buffer layout for SCP_IPI_INIT response. This structure should sync
- * across kernel and EC.
- */
-struct scp_run_t {
-	uint32_t signaled;
-	int8_t fw_ver[SCP_FW_VERSION_LEN];
-	uint32_t dec_capability;
-	uint32_t enc_capability;
-};
-
-/*
- * The layout of the IPC0 AP/SCP shared buffer.
- * This should sync across kernel and EC.
- */
-struct ipc_shared_obj {
-	/* IPI ID */
-	int32_t id;
-	/* Length of the contents in buffer. */
-	uint32_t len;
-	/* Shared buffer contents. */
-	uint8_t buffer[CONFIG_IPC_SHARED_OBJ_BUF_SIZE];
-};
-
-/* Send a IPI contents to AP.  This shouldn't be used in ISR context. */
-int ipi_send(int32_t id, const void *buf, uint32_t len, int wait);
-
-/*
- * An IPC IRQ could be shared across many IPI handlers.
- * Those handlers would usually operate on disabling or enabling the IPC IRQ.
- * This may disorder the actual timing to on/off the IRQ when there are many
- * tasks try to operate on it.  As a result, any access to the SCP_IRQ_*
- * should go through ipi_{en,dis}able_irq(), which support a counter to
- * enable/disable the IRQ at correct timing.
- */
-/* Disable IPI IRQ. */
-void ipi_disable_irq(void);
-/* Enable IPI IRQ. */
-void ipi_enable_irq(void);
-
-/* IPI tables */
-extern void (*const ipi_handler_table[])(int32_t, void *, uint32_t);
-extern int *const ipi_wakeup_table[];
-
-/* Helper macros to build the IPI handler and wakeup functions. */
-#define IPI_HANDLER(id) CONCAT3(ipi_, id, _handler)
-#define IPI_WAKEUP(id) CONCAT3(ipi_, id, _wakeup)
-
-/*
- * Macro to declare an IPI handler.
- * _id: The ID of the IPI
- * handler: The IPI handler function
- * is_wakeup_src: Declare IPI ID as a wake-up source or not
- */
-#define DECLARE_IPI(_id, handler, is_wakeup_src) \
-	struct ipi_num_check##_id { \
-		int tmp1[_id < IPI_COUNT ? 1 : -1]; \
-		int tmp2[is_wakeup_src == 0 || is_wakeup_src == 1 ? 1 : -1]; \
-	};  \
-	void __keep IPI_HANDLER(_id)(int32_t id, void *buf, uint32_t len) \
-	{ \
-		handler(id, buf, len); \
-	} \
-	const int __keep IPI_WAKEUP(_id) = is_wakeup_src
-
-#endif /* __CROS_EC_IPI_CHIP_H */
diff --git a/chip/mt_scp/rv32i_common/ipi_table.c b/chip/mt_scp/rv32i_common/ipi_table.c
deleted file mode 100644
index 8fe3f1e598..0000000000
--- a/chip/mt_scp/rv32i_common/ipi_table.c
+++ /dev/null
@@ -1,67 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- * IPI handlers declaration
- */
-
-#include "common.h"
-#include "ipi_chip.h"
-
-typedef void (*ipi_handler_t)(int32_t id, void *data, uint32_t len);
-
-#ifndef PASS
-#define PASS 1
-#endif
-
-#define ipi_arguments int32_t id, void *data, uint32_t len
-
-#if PASS == 1
-void ipi_handler_undefined(ipi_arguments) { }
-
-const int ipi_wakeup_undefined;
-
-#define table(type, name, x) x
-
-#define ipi_x_func(suffix, args, number)                                       \
-	extern void __attribute__(                                             \
-		(used, weak, alias(STRINGIFY(ipi_##suffix##_undefined))))      \
-		ipi_##number##_##suffix(args);
-
-#define ipi_x_var(suffix, number)                                              \
-	extern int __attribute__(                                              \
-		(weak, alias(STRINGIFY(ipi_##suffix##_undefined))))            \
-		ipi_##number##_##suffix;
-
-#endif /* PASS == 1 */
-
-#if PASS == 2
-
-#undef table
-#undef ipi_x_func
-#undef ipi_x_var
-
-#define table(type, name, x)                                                   \
-	type const name[]                                                      \
-		__attribute__((aligned(4), used, section(".rodata.ipi"))) = {x}
-
-#define ipi_x_var(suffix, number)                                              \
-	[number < IPI_COUNT ? number : -1] = &ipi_##number##_##suffix,
-
-#define ipi_x_func(suffix, args, number) ipi_x_var(suffix, number)
-
-#endif /* PASS == 2 */
-
-/*
- * Include generated IPI table (by util/gen_ipi_table). The contents originate
- * from IPI_COUNT definition in board.h
- */
-#include "ipi_table_gen.inc"
-
-#if PASS == 1
-#undef PASS
-#define PASS 2
-#include "ipi_table.c"
-BUILD_ASSERT(ARRAY_SIZE(ipi_handler_table) == IPI_COUNT);
-BUILD_ASSERT(ARRAY_SIZE(ipi_wakeup_table) == IPI_COUNT);
-#endif
diff --git a/chip/mt_scp/rv32i_common/memmap.c b/chip/mt_scp/rv32i_common/memmap.c
deleted file mode 100644
index a666bb23d7..0000000000
--- a/chip/mt_scp/rv32i_common/memmap.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "cache.h"
-#include "registers.h"
-#include "stdint.h"
-
-/*
- * Map SCP address (bits 31~28) to AP address
- *
- * SCP address	AP address	Note
- *
- * 0x0000_0000			SRAM
- * 0x1000_0000	0x5000_0000	CPU DRAM
- * 0x2000_0000	0x7000_0000
- * 0x3000_0000
- *
- * 0x4000_0000
- * 0x5000_0000	0x0000_0000
- * 0x6000_0000	0x1000_0000
- * 0x7000_0000	0xa000_0000
- *
- * 0x8000_0000
- * 0x9000_0000	0x8000_0000
- * 0xa000_0000	0x9000_0000
- * 0xb000_0000
- *
- * 0xc000_0000	0x8000_0000
- * 0xd000_0000	0x2000_0000
- * 0xe000_0000	0x3000_0000
- * 0xf000_0000	0x6000_0000
- */
-
-#define REMAP_ADDR_SHIFT		28
-#define REMAP_ADDR_LSB_MASK		(BIT(REMAP_ADDR_SHIFT) - 1)
-#define REMAP_ADDR_MSB_MASK		((~0) << REMAP_ADDR_SHIFT)
-#define MAP_INVALID 0xff
-
-static const uint8_t addr_map[16] = {
-	MAP_INVALID,	/* SRAM */
-	0x5,		/* ext_addr_0x1 */
-	0x7,		/* ext_addr_0x2 */
-	MAP_INVALID,	/* no ext_addr_0x3 */
-
-	MAP_INVALID,	/* no ext_addr_0x4 */
-	0x0,		/* ext_addr_0x5 */
-	0x1,		/* ext_addr_0x6 */
-	0xa,		/* ext_addr_0x7 */
-
-	MAP_INVALID,	/* no ext_addr_0x8 */
-	0x8,		/* ext_addr_0x9 */
-	0x9,		/* ext_addr_0xa */
-	MAP_INVALID,	/* no ext_addr_0xb */
-
-	0x8,		/* ext_addr_0xc */
-	0x2,		/* ext_addr_0xd */
-	0x3,		/* ext_addr_0xe */
-	0x6,		/* ext_addr_0xf */
-};
-
-void memmap_init(void)
-{
-	SCP_R_REMAP_0X0123 =
-		(uint32_t)addr_map[0x1] << 8 |
-		(uint32_t)addr_map[0x2] << 16;
-
-	SCP_R_REMAP_0X4567 =
-		(uint32_t)addr_map[0x5] << 8 |
-		(uint32_t)addr_map[0x6] << 16 |
-		(uint32_t)addr_map[0x7] << 24;
-
-	SCP_R_REMAP_0X89AB =
-		(uint32_t)addr_map[0x9] << 8 |
-		(uint32_t)addr_map[0xa] << 16;
-
-	SCP_R_REMAP_0XCDEF =
-		(uint32_t)addr_map[0xc] |
-		(uint32_t)addr_map[0xd] << 8 |
-		(uint32_t)addr_map[0xe] << 16 |
-		(uint32_t)addr_map[0xf] << 24;
-
-	cache_init();
-}
-
-int memmap_ap_to_scp(uintptr_t ap_addr, uintptr_t *scp_addr)
-{
-	int i;
-	uint8_t msb = ap_addr >> REMAP_ADDR_SHIFT;
-
-	for (i = 0; i < ARRAY_SIZE(addr_map); ++i) {
-		if (addr_map[i] != msb)
-			continue;
-
-		*scp_addr = (ap_addr & REMAP_ADDR_LSB_MASK) |
-			(i << REMAP_ADDR_SHIFT);
-		return EC_SUCCESS;
-	}
-
-	return EC_ERROR_INVAL;
-}
-
-int memmap_scp_to_ap(uintptr_t scp_addr, uintptr_t *ap_addr)
-{
-	int i = scp_addr >> REMAP_ADDR_SHIFT;
-
-	if (addr_map[i] == MAP_INVALID)
-		return EC_ERROR_INVAL;
-
-	*ap_addr = (scp_addr & REMAP_ADDR_LSB_MASK) |
-		(addr_map[i] << REMAP_ADDR_SHIFT);
-	return EC_SUCCESS;
-}
diff --git a/chip/mt_scp/rv32i_common/memmap.h b/chip/mt_scp/rv32i_common/memmap.h
deleted file mode 100644
index 0857c9a89e..0000000000
--- a/chip/mt_scp/rv32i_common/memmap.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef __CROS_EC_MEMMAP_H
-#define __CROS_EC_MEMMAP_H
-
-#include "stdint.h"
-
-void memmap_init(void);
-
-/**
- * Translate AP addr to SCP addr.
- *
- * @param ap_addr		AP address to translate
- * @param scp_addr		Translated AP address
- * @return			EC_SUCCESS or EC_ERROR_INVAL
- */
-int memmap_ap_to_scp(uintptr_t ap_addr, uintptr_t *scp_addr);
-
-/**
- * Translate SCP addr to AP addr.
- *
- * @param scp_addr		SCP address to translate
- * @param ap_addr		Translated SCP address
- * @return			EC_SUCCESS or EC_ERROR_INVAL
- */
-int memmap_scp_to_ap(uintptr_t scp_addr, uintptr_t *ap_addr);
-
-#endif /* #ifndef __CROS_EC_MEMMAP_H */
diff --git a/chip/mt_scp/rv32i_common/registers.h b/chip/mt_scp/rv32i_common/registers.h
deleted file mode 100644
index adbef5f98b..0000000000
--- a/chip/mt_scp/rv32i_common/registers.h
+++ /dev/null
@@ -1,211 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* Register map */
-
-#ifndef __CROS_EC_REGISTERS_H
-#define __CROS_EC_REGISTERS_H
-
-#include "common.h"
-#include "compile_time_macros.h"
-#include "intc.h"
-
-#define UNIMPLEMENTED_GPIO_BANK 0
-
-#define SCP_REG_BASE			0x70000000
-
-/* clock control */
-#define SCP_CLK_CTRL_BASE		(SCP_REG_BASE + 0x21000)
-/* system clock counter value */
-#define SCP_CLK_SYS_VAL			REG32(SCP_CLK_CTRL_BASE + 0x0014)
-#define   CLK_SYS_VAL_MASK		(0x3ff << 0)
-#define   CLK_SYS_VAL_VAL(v)		((v) & CLK_SYS_VAL_MASK)
-/* ULPOSC clock counter value */
-#define SCP_CLK_HIGH_VAL		REG32(SCP_CLK_CTRL_BASE + 0x0018)
-#define   CLK_HIGH_VAL_MASK             (0x1f << 0)
-#define   CLK_HIGH_VAL_VAL(v)		((v) & CLK_HIGH_VAL_MASK)
-/* sleep mode control */
-#define SCP_SLEEP_CTRL                  REG32(SCP_CLK_CTRL_BASE + 0x0020)
-#define   SLP_CTRL_EN			BIT(0)
-#define   VREQ_COUNT_MASK		(0x7F << 1)
-#define   VREQ_COUNT_VAL(v)		(((v) << 1) & VREQ_COUNT_MASK)
-#define   SPM_SLP_MODE			BIT(8)
-/* clock divider select */
-#define SCP_CLK_DIV_SEL			REG32(SCP_CLK_CTRL_BASE + 0x0024)
-#define   CLK_DIV_SEL1			0
-#define   CLK_DIV_SEL2			1
-#define   CLK_DIV_SEL4			2
-#define   CLK_DIV_SEL3			3
-/* clock gate */
-#define SCP_SET_CLK_CG			REG32(SCP_CLK_CTRL_BASE + 0x0030)
-#define   CG_TIMER_MCLK			BIT(0)
-#define   CG_TIMER_BCLK			BIT(1)
-#define   CG_MAD_MCLK			BIT(2)
-#define   CG_I2C_MCLK			BIT(3)
-#define   CG_I2C_BCLK			BIT(4)
-#define   CG_GPIO_MCLK			BIT(5)
-#define   CG_AP2P_MCLK			BIT(6)
-#define   CG_UART0_MCLK			BIT(7)
-#define   CG_UART0_BCLK			BIT(8)
-#define   CG_UART0_RST			BIT(9)
-#define   CG_UART1_MCLK			BIT(10)
-#define   CG_UART1_BCLK			BIT(11)
-#define   CG_UART1_RST			BIT(12)
-#define   CG_SPI0			BIT(13)
-#define   CG_SPI1			BIT(14)
-#define   CG_SPI2			BIT(15)
-#define   CG_DMA_CH0			BIT(16)
-#define   CG_DMA_CH1			BIT(17)
-#define   CG_DMA_CH2			BIT(18)
-#define   CG_DMA_CH3			BIT(19)
-#define   CG_I3C0			BIT(21)
-#define   CG_I3C1			BIT(22)
-#define   CG_DMA2_CH0			BIT(23)
-#define   CG_DMA2_CH1			BIT(24)
-#define   CG_DMA2_CH2			BIT(25)
-#define   CG_DMA2_CH3			BIT(26)
-/* UART clock select */
-#define SCP_UART_CK_SEL			REG32(SCP_CLK_CTRL_BASE + 0x0044)
-#define   UART0_CK_SEL_SHIFT		0
-#define   UART0_CK_SEL_MASK		(0x3 << UART0_CK_SEL_SHIFT)
-#define   UART0_CK_SEL_VAL(v)		((v) & UART0_CK_SEL_MASK)
-#define   UART0_CK_SW_STATUS_MASK	(0xf << 8)
-#define   UART0_CK_SW_STATUS_VAL(v)	((v) & UART0_CK_SW_STATUS_MASK)
-#define   UART1_CK_SEL_SHIFT		16
-#define   UART1_CK_SEL_MASK		(0x3 << UART1_CK_SEL_SHIFT)
-#define   UART1_CK_SEL_VAL(v)		((v) & UART1_CK_SEL_MASK)
-#define   UART1_CK_SW_STATUS_MASK	(0xf << 24)
-#define   UART1_CK_SW_STATUS_VAL(v)	((v) & UART1_CK_SW_STATUS_MASK)
-#define     UART_CK_SEL_26M		0
-#define     UART_CK_SEL_32K		1
-#define     UART_CK_SEL_ULPOSC		2
-#define     UART_CK_SW_STATUS_26M	BIT(0)
-#define     UART_CK_SW_STATUS_32K	BIT(1)
-#define     UART_CK_SW_STATUS_ULPOS	BIT(2)
-/* BCLK clock select */
-#define SCP_BCLK_CK_SEL			REG32(SCP_CLK_CTRL_BASE + 0x0048)
-#define   BCLK_CK_SEL_SYS_DIV8		0
-#define   BCLK_CK_SEL_32K		1
-#define   BCLK_CK_SEL_ULPOSC_DIV8	2
-/* VREQ control */
-#define SCP_CPU_VREQ_CTRL		REG32(SCP_CLK_CTRL_BASE + 0x0054)
-#define   VREQ_SEL			BIT(0)
-#define   VREQ_VALUE			BIT(4)
-#define   VREQ_EXT_SEL			BIT(8)
-#define   VREQ_DVFS_SEL			BIT(16)
-#define   VREQ_DVFS_VALUE		BIT(20)
-#define   VREQ_DVFS_EXT_SEL		BIT(24)
-#define   VREQ_SRCLKEN_SEL		BIT(27)
-#define   VREQ_SRCLKEN_VALUE		BIT(28)
-/* clock on control */
-#define SCP_CLK_HIGH_CORE_CG		REG32(SCP_CLK_CTRL_BASE + 0x005C)
-#define   HIGH_CORE_CG			BIT(1)
-#define SCP_CLK_ON_CTRL			REG32(SCP_CLK_CTRL_BASE + 0x006C)
-#define   HIGH_AO			BIT(0)
-#define   HIGH_DIS_SUB			BIT(1)
-#define   HIGH_CG_AO			BIT(2)
-#define   HIGH_CORE_AO			BIT(4)
-#define   HIGH_CORE_DIS_SUB		BIT(5)
-#define   HIGH_CORE_CG_AO		BIT(6)
-
-/* system control */
-#define SCP_SYS_CTRL			REG32(SCP_REG_BASE + 0x24000)
-#define   AUTO_DDREN			BIT(9)
-
-/* IPC */
-#define SCP_SCP2APMCU_IPC_SET		REG32(SCP_REG_BASE + 0x24080)
-#define SCP_SCP2SPM_IPC_SET		REG32(SCP_REG_BASE + 0x24090)
-#define   IPC_SCP2HOST			BIT(0)
-#define SCP_GIPC_IN_SET			REG32(SCP_REG_BASE + 0x24098)
-#define SCP_GIPC_IN_CLR			REG32(SCP_REG_BASE + 0x2409C)
-#define   GIPC_IN(n)			BIT(n)
-
-/* UART */
-#define SCP_UART_COUNT			2
-#define UART_TX_IRQ(n)			CONCAT3(SCP_IRQ_UART, n, _TX)
-#define UART_RX_IRQ(n)			CONCAT3(SCP_IRQ_UART, n, _RX)
-#define SCP_UART0_BASE			(SCP_REG_BASE + 0x26000)
-#define SCP_UART1_BASE			(SCP_REG_BASE + 0x27000)
-#define SCP_UART_BASE(n)		CONCAT3(SCP_UART, n, _BASE)
-#define UART_REG(n, offset)		REG32_ADDR(SCP_UART_BASE(n))[offset]
-
-/* WDT */
-#define SCP_CORE0_WDT_IRQ		REG32(SCP_REG_BASE + 0x30030)
-#define SCP_CORE0_WDT_CFG		REG32(SCP_REG_BASE + 0x30034)
-#define   WDT_FREQ			33825 /* 0xFFFFF / 31 */
-#define   WDT_MAX_PERIOD		0xFFFFF /* 31 seconds */
-#define   WDT_PERIOD(ms)		(WDT_FREQ * (ms) / 1000)
-#define   WDT_EN			BIT(31)
-#define SCP_CORE0_WDT_KICK		REG32(SCP_REG_BASE + 0x30038)
-#define SCP_CORE0_WDT_CUR_VAL		REG32(SCP_REG_BASE + 0x3003C)
-
-/* INTC */
-#define SCP_INTC_WORD(irq)		((irq) >> 5) /* word length = 2^5 */
-#define SCP_INTC_BIT(irq)		((irq) & 0x1F) /* bit shift =LSB[0:4] */
-#define SCP_INTC_GRP_COUNT		15
-#define SCP_INTC_GRP_GAP		4
-
-#define SCP_CORE0_INTC_IRQ_BASE		(SCP_REG_BASE + 0x32000)
-#define SCP_CORE0_INTC_IRQ_STA(w) \
-		REG32_ADDR(SCP_CORE0_INTC_IRQ_BASE + 0x0010)[(w)]
-#define SCP_CORE0_INTC_IRQ_EN(w) \
-		REG32_ADDR(SCP_CORE0_INTC_IRQ_BASE + 0x0020)[(w)]
-#define SCP_CORE0_INTC_IRQ_POL(w) \
-		REG32_ADDR(SCP_CORE0_INTC_IRQ_BASE + 0x0040)[(w)]
-#define SCP_CORE0_INTC_IRQ_GRP(g, w) \
-		REG32_ADDR(SCP_CORE0_INTC_IRQ_BASE + 0x0050 + \
-			   ((g) << SCP_INTC_GRP_GAP))[(w)]
-#define SCP_CORE0_INTC_IRQ_GRP_STA(g, w) \
-		REG32_ADDR(SCP_CORE0_INTC_IRQ_BASE + 0x0150 + \
-			   ((g) << SCP_INTC_GRP_GAP))[(w)]
-#define SCP_CORE0_INTC_SLP_WAKE_EN(w) \
-		REG32_ADDR(SCP_CORE0_INTC_IRQ_BASE + 0x0240)[(w)]
-#define SCP_CORE0_INTC_IRQ_OUT		REG32(SCP_CORE0_INTC_IRQ_BASE + 0x0250)
-/* UART */
-#define SCP_CORE0_INTC_UART0_RX_IRQ	REG32(SCP_CORE0_INTC_IRQ_BASE + 0x0258)
-#define SCP_CORE0_INTC_UART1_RX_IRQ	REG32(SCP_CORE0_INTC_IRQ_BASE + 0x025C)
-#define SCP_CORE0_INTC_UART_RX_IRQ(n)	CONCAT3(SCP_CORE0_INTC_UART, n, _RX_IRQ)
-
-/* XGPT (general purpose timer) */
-#define NUM_TIMERS			6
-#define SCP_CORE0_TIMER_BASE(n)		(SCP_REG_BASE + 0x33000 + (0x10 * (n)))
-#define SCP_CORE0_TIMER_EN(n)		REG32(SCP_CORE0_TIMER_BASE(n) + 0x0000)
-#define   TIMER_EN			BIT(0)
-#define   TIMER_CLK_SRC_32K		(0 << 4)
-#define   TIMER_CLK_SRC_26M		(1 << 4)
-#define   TIMER_CLK_SRC_BCLK		(2 << 4)
-#define   TIMER_CLK_SRC_MCLK		(3 << 4)
-#define   TIMER_CLK_SRC_MASK		(3 << 4)
-#define SCP_CORE0_TIMER_RST_VAL(n)	REG32(SCP_CORE0_TIMER_BASE(n) + 0x0004)
-#define SCP_CORE0_TIMER_CUR_VAL(n)	REG32(SCP_CORE0_TIMER_BASE(n) + 0x0008)
-#define SCP_CORE0_TIMER_IRQ_CTRL(n)	REG32(SCP_CORE0_TIMER_BASE(n) + 0x000C)
-#define   TIMER_IRQ_EN			BIT(0)
-#define   TIMER_IRQ_STATUS		BIT(4)
-#define   TIMER_IRQ_CLR			BIT(5)
-#define SCP_IRQ_TIMER(n)		CONCAT2(SCP_IRQ_TIMER, n)
-
-/* secure control */
-#define SCP_SEC_CTRL			REG32(SCP_REG_BASE + 0xA5000)
-#define   VREQ_SECURE_DIS		BIT(4)
-/* memory remap */
-#define SCP_R_REMAP_0X0123		REG32(SCP_REG_BASE + 0xA5060)
-#define SCP_R_REMAP_0X4567		REG32(SCP_REG_BASE + 0xA5064)
-#define SCP_R_REMAP_0X89AB		REG32(SCP_REG_BASE + 0xA5068)
-#define SCP_R_REMAP_0XCDEF		REG32(SCP_REG_BASE + 0xA506C)
-
-/* external address: AP */
-#define AP_REG_BASE			0x60000000 /* 0x10000000 remap to 0x6 */
-/* AP GPIO */
-#define AP_GPIO_BASE			(AP_REG_BASE + 0x5000)
-#define AP_GPIO_MODE11_SET		REG32(AP_GPIO_BASE + 0x03B4)
-#define AP_GPIO_MODE11_CLR		REG32(AP_GPIO_BASE + 0x03B8)
-#define AP_GPIO_MODE12_SET		REG32(AP_GPIO_BASE + 0x03C4)
-#define AP_GPIO_MODE12_CLR		REG32(AP_GPIO_BASE + 0x03C8)
-#define AP_GPIO_MODE20_SET		REG32(AP_GPIO_BASE + 0x0444)
-#define AP_GPIO_MODE20_CLR		REG32(AP_GPIO_BASE + 0x0448)
-
-#include "clock_regs.h"
-
-#endif /* __CROS_EC_REGISTERS_H */
diff --git a/chip/mt_scp/rv32i_common/system.c b/chip/mt_scp/rv32i_common/system.c
deleted file mode 100644
index 0e12154f6d..0000000000
--- a/chip/mt_scp/rv32i_common/system.c
+++ /dev/null
@@ -1,50 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* System : hardware specific implementation */
-
-#include "csr.h"
-#include "memmap.h"
-#include "registers.h"
-#include "system.h"
-
-void system_pre_init(void)
-{
-	memmap_init();
-
-	/* enable CPU and platform low power CG */
-	/* enable CPU DCM */
-	set_csr(CSR_MCTREN, CSR_MCTREN_CG);
-
-	/* Disable jump (it has only RW) */
-	system_disable_jump();
-}
-
-void system_reset(int flags)
-{
-	while (1)
-		;
-}
-
-int system_get_bbram(enum system_bbram_idx idx, uint8_t *value)
-{
-	return EC_ERROR_INVAL;
-}
-
-const char *system_get_chip_vendor(void)
-{
-	return "mtk";
-}
-
-const char *system_get_chip_name(void)
-{
-	/* Support only SCP_A for now */
-	return "scp_a";
-}
-
-const char *system_get_chip_revision(void)
-{
-	return "";
-}
diff --git a/chip/mt_scp/rv32i_common/uart.c b/chip/mt_scp/rv32i_common/uart.c
deleted file mode 100644
index 35b4003c9f..0000000000
--- a/chip/mt_scp/rv32i_common/uart.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* SCP UART module */
-
-#include "csr.h"
-#include "system.h"
-#include "uart.h"
-#include "uart_regs.h"
-#include "util.h"
-
-/*
- * UARTN == 0, SCP UART0
- * UARTN == 1, SCP UART1
- * UARTN == 2, AP UART1
- */
-#define UARTN CONFIG_UART_CONSOLE
-#define UART_IDLE_WAIT_US 500
-#define UART_INTC_GROUP 12
-
-static uint8_t init_done, tx_started;
-
-void uart_init(void)
-{
-	const uint32_t baud_rate = CONFIG_UART_BAUD_RATE;
-	const uint32_t uart_clock = 26000000;
-	const uint32_t div = DIV_ROUND_NEAREST(uart_clock, baud_rate * 16);
-
-	uart_init_pinmux();
-
-	/* Clear FIFO */
-	UART_FCR(UARTN) = UART_FCR_ENABLE_FIFO
-		| UART_FCR_CLEAR_RCVR
-		| UART_FCR_CLEAR_XMIT;
-	/* Line control: parity none, 8 bit, 1 stop bit */
-	UART_LCR(UARTN) = UART_LCR_WLEN8;
-	/* For baud rate <= 115200 */
-	UART_HIGHSPEED(UARTN) = 0;
-
-	/* DLAB start */
-	UART_LCR(UARTN) |= UART_LCR_DLAB;
-	UART_DLL(UARTN) = div & 0xff;
-	UART_DLH(UARTN) = (div >> 8) & 0xff;
-	UART_LCR(UARTN) &= ~UART_LCR_DLAB;
-	/* DLAB end */
-
-	/* Enable received data interrupt */
-	UART_IER(UARTN) |= UART_IER_RDI;
-
-#if (UARTN < SCP_UART_COUNT)
-	task_enable_irq(UART_TX_IRQ(UARTN));
-	task_enable_irq(UART_RX_IRQ(UARTN));
-#endif
-
-	init_done = 1;
-}
-
-int uart_init_done(void)
-{
-	return init_done;
-}
-
-void uart_tx_flush(void)
-{
-	while (!(UART_LSR(UARTN) & UART_LSR_TEMT))
-		;
-}
-
-int uart_tx_ready(void)
-{
-	return UART_LSR(UARTN) & UART_LSR_THRE;
-}
-
-int uart_rx_available(void)
-{
-	return UART_LSR(UARTN) & UART_LSR_DR;
-}
-
-void uart_write_char(char c)
-{
-	while (!uart_tx_ready())
-		;
-
-	UART_THR(UARTN) = c;
-}
-
-int uart_read_char(void)
-{
-	return UART_RBR(UARTN);
-}
-
-void uart_tx_start(void)
-{
-	tx_started = 1;
-	if (UART_IER(UARTN) & UART_IER_THRI)
-		return;
-	disable_sleep(SLEEP_MASK_UART);
-	UART_IER(UARTN) |= UART_IER_THRI;
-}
-
-void uart_tx_stop(void)
-{
-	/*
-	 * Workaround for b/157541273.
-	 * Don't unset the THRI flag unless we are in the UART ISR.
-	 *
-	 * Note:
-	 * MICAUSE denotes current INTC group number.
-	 */
-	if (in_interrupt_context() &&
-	    read_csr(CSR_VIC_MICAUSE) != UART_INTC_GROUP)
-		return;
-
-	tx_started = 0;
-	UART_IER(UARTN) &= ~UART_IER_THRI;
-	enable_sleep(SLEEP_MASK_UART);
-}
-
-static void uart_process(void)
-{
-	uart_process_input();
-	uart_process_output();
-}
-
-#if (UARTN < SCP_UART_COUNT)
-static void uart_irq_handler(void)
-{
-	extern volatile int ec_int;
-
-	switch (ec_int) {
-	case UART_TX_IRQ(UARTN):
-		uart_process();
-		task_clear_pending_irq(ec_int);
-		break;
-	case UART_RX_IRQ(UARTN):
-		uart_process();
-		SCP_CORE0_INTC_UART_RX_IRQ(UARTN) = BIT(0);
-		asm volatile ("fence.i" ::: "memory");
-		task_clear_pending_irq(ec_int);
-		break;
-	}
-}
-DECLARE_IRQ(UART_INTC_GROUP, uart_irq_handler, 0);
-#else
-
-#ifndef HAS_TASK_APUART
-#error "APUART task hasn't defined in ec.tasklist."
-#endif
-
-void uart_task(void)
-{
-	while (1) {
-		if (uart_rx_available() || tx_started)
-			uart_process();
-		else
-			task_wait_event(UART_IDLE_WAIT_US);
-	}
-}
-#endif
diff --git a/chip/mt_scp/rv32i_common/uart_regs.h b/chip/mt_scp/rv32i_common/uart_regs.h
deleted file mode 100644
index c88b9c758b..0000000000
--- a/chip/mt_scp/rv32i_common/uart_regs.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* SCP UART module registers */
-
-#ifndef __CROS_EC_UART_REGS_H
-#define __CROS_EC_UART_REGS_H
-
-#include "registers.h"
-
-/* Chip specific function for setting UART pinmux. */
-void uart_init_pinmux(void);
-
-/* DLAB (Divisor Latch Access Bit) == 0 */
-
-/* (Read) receiver buffer register */
-#define UART_RBR(n)			UART_REG(n, 0)
-/* (Write) transmitter holding register */
-#define UART_THR(n)			UART_REG(n, 0)
-/* (Write) interrupt enable register */
-#define UART_IER(n)			UART_REG(n, 1)
-#define   UART_IER_RDI			BIT(0) /* received data */
-#define   UART_IER_THRI			BIT(1) /* THR empty */
-#define   UART_IER_RLSI			BIT(2) /* receiver LSR change */
-#define   UART_IER_MSI			BIT(3) /* MSR change */
-/* (Read) interrupt identification register */
-#define UART_IIR(n)			UART_REG(n, 2)
-#define   UART_IIR_ID_MASK		0x0e
-#define   UART_IIR_MSI			0x00 /* modem status change */
-#define   UART_IIR_NO_INT		0x01 /* no int pending */
-#define   UART_IIR_THRI			0x02 /* THR empty */
-#define   UART_IIR_RDI			0x04 /* received data available */
-#define   UART_IIR_RLSI			0x06 /* line status change */
-/* (Write) FIFO control register */
-#define UART_FCR(n)			UART_REG(n, 2)
-#define   UART_FCR_ENABLE_FIFO		BIT(0) /* enable FIFO */
-#define   UART_FCR_CLEAR_RCVR		BIT(1) /* clear receive FIFO */
-#define   UART_FCR_CLEAR_XMIT		BIT(2) /* clear transmit FIFO */
-#define   UART_FCR_DMA_SELECT		BIT(3) /* select DMA mode */
-/* (Write) line control register */
-#define UART_LCR(n)			UART_REG(n, 3)
-#define   UART_LCR_WLEN5		0 /* word length 5 bits */
-#define   UART_LCR_WLEN6		1
-#define   UART_LCR_WLEN7		2
-#define   UART_LCR_WLEN8		3
-#define   UART_LCR_STOP			BIT(2) /* stop bits: 1bit, 2bits */
-#define   UART_LCR_PARITY		BIT(3) /* parity enable */
-#define   UART_LCR_EPAR			BIT(4) /* even parity */
-#define   UART_LCR_SPAR			BIT(5) /* stick parity */
-#define   UART_LCR_SBC			BIT(6) /* set break control */
-#define   UART_LCR_DLAB			BIT(7) /* divisor latch access */
-/* (Write) modem control register */
-#define UART_MCR(n)			UART_REG(n, 4)
-/* (Read) line status register */
-#define UART_LSR(n)			UART_REG(n, 5)
-#define   UART_LSR_DR			BIT(0) /* data ready */
-#define   UART_LSR_OE			BIT(1) /* overrun error */
-#define   UART_LSR_PE			BIT(2) /* parity error */
-#define   UART_LSR_FE			BIT(3) /* frame error */
-#define   UART_LSR_BI			BIT(4) /* break interrupt */
-#define   UART_LSR_THRE			BIT(5) /* THR empty */
-#define   UART_LSR_TEMT			BIT(6) /* THR empty, line idle */
-#define   UART_LSR_FIFOE		BIT(7) /* FIFO error */
-/* (Read) modem status register */
-#define UART_MSR(n)			UART_REG(n, 6)
-/* (Read/Write) scratch register */
-#define UART_SCR(n)			UART_REG(n, 7)
-
-/* DLAB == 1 */
-
-/* (Write) divisor latch */
-#define UART_DLL(n)			UART_REG(n, 0)
-#define UART_DLH(n)			UART_REG(n, 1)
-
-/* MTK extension */
-#define UART_HIGHSPEED(n)		UART_REG(n, 9)
-
-#endif /* __CROS_EC_UART_REGS_H */
diff --git a/chip/mt_scp/rv32i_common/video.h b/chip/mt_scp/rv32i_common/video.h
deleted file mode 100644
index e4538c4456..0000000000
--- a/chip/mt_scp/rv32i_common/video.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/* Copyright 2021 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef __CROS_EC_VIDEO_H
-#define __CROS_EC_VIDEO_H
-
-#include "common.h"
-
-/*
- * Video decoder supported capability
- */
-#define VDEC_CAP_4K_DISABLED BIT(4)
-#define VDEC_CAP_MM21 BIT(5)
-#define VDEC_CAP_MT21C BIT(6)
-#define VDEC_CAP_H264_SLICE BIT(8)
-#define VDEC_CAP_VP8_FRAME BIT(9)
-#define VDEC_CAP_VP9_FRAME BIT(10)
-#define VDEC_CAP_IRQ_IN_SCP BIT(16)
-
-/*
- * Video encoder supported capability:
- * BIT(0): enable 4K
- */
-#define VENC_CAP_4K BIT(0)
-
-uint32_t video_get_enc_capability(void);
-uint32_t video_get_dec_capability(void);
-
-#endif /* #ifndef __CROS_EC_VIDEO_H */
diff --git a/chip/mt_scp/rv32i_common/watchdog.c b/chip/mt_scp/rv32i_common/watchdog.c
deleted file mode 100644
index 72ca5edad8..0000000000
--- a/chip/mt_scp/rv32i_common/watchdog.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/* Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* Watchdog driver */
-
-#include "common.h"
-#include "hooks.h"
-#include "registers.h"
-#include "watchdog.h"
-
-void watchdog_reload(void)
-{
-	SCP_CORE0_WDT_KICK = BIT(0);
-}
-DECLARE_HOOK(HOOK_TICK, watchdog_reload, HOOK_PRIO_DEFAULT);
-
-int watchdog_init(void)
-{
-	const uint32_t timeout = WDT_PERIOD(CONFIG_WATCHDOG_PERIOD_MS);
-
-	/* disable watchdog */
-	SCP_CORE0_WDT_CFG &= ~WDT_EN;
-	/* clear watchdog irq */
-	SCP_CORE0_WDT_IRQ |= BIT(0);
-	/* enable watchdog */
-	SCP_CORE0_WDT_CFG = WDT_EN | timeout;
-	/* reload watchdog */
-	watchdog_reload();
-
-	return EC_SUCCESS;
-}
author	Jack Rosenthal <jrosenth@chromium.org>	2021-11-04 12:11:58 -0600
committer	Commit Bot <commit-bot@chromium.org>	2021-11-05 04:22:34 +0000
commit	252457d4b21f46889eebad61d4c0a65331919cec (patch)
tree	01856c4d31d710b20e85a74c8d7b5836e35c3b98 /chip/mt_scp/rv32i_common
parent	08f5a1e6fc2c9467230444ac9b582dcf4d9f0068 (diff)
download	chrome-ec-stabilize-14498.B-ish.tar.gz