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-rw-r--r--core/riscv-rv32i/task.c115
1 files changed, 53 insertions, 62 deletions
diff --git a/core/riscv-rv32i/task.c b/core/riscv-rv32i/task.c
index edc31a872e..84415dcda9 100644
--- a/core/riscv-rv32i/task.c
+++ b/core/riscv-rv32i/task.c
@@ -1,4 +1,4 @@
-/* Copyright 2019 The Chromium OS Authors. All rights reserved.
+/* Copyright 2019 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
@@ -6,10 +6,12 @@
/* Task scheduling / events module for Chrome EC operating system */
#include "atomic.h"
+#include "builtin/assert.h"
#include "console.h"
#include "cpu.h"
#include "irq_chip.h"
#include "link_defs.h"
+#include "panic.h"
#include "task.h"
#include "timer.h"
#include "util.h"
@@ -19,10 +21,10 @@ typedef struct {
* Note that sp must be the first element in the task struct
* for __switchto() to work.
*/
- uint32_t sp; /* Saved stack pointer for context switch */
- atomic_t events; /* Bitmaps of received events */
- uint64_t runtime; /* Time spent in task */
- uint32_t *stack; /* Start of stack */
+ uint32_t sp; /* Saved stack pointer for context switch */
+ atomic_t events; /* Bitmaps of received events */
+ uint64_t runtime; /* Time spent in task */
+ uint32_t *stack; /* Start of stack */
} task_;
/* Value to store in unused stack */
@@ -36,11 +38,9 @@ CONFIG_TEST_TASK_LIST
#undef TASK
/* Task names for easier debugging */
-#define TASK(n, r, d, s) #n,
-static const char * const task_names[] = {
- "<< idle >>",
- CONFIG_TASK_LIST
- CONFIG_TEST_TASK_LIST
+#define TASK(n, r, d, s) #n,
+static const char *const task_names[] = {
+ "<< idle >>", CONFIG_TASK_LIST CONFIG_TEST_TASK_LIST
};
#undef TASK
@@ -48,12 +48,12 @@ static const char * const task_names[] = {
static int task_will_switch;
static uint32_t exc_sub_time;
static uint64_t task_start_time; /* Time task scheduling started */
-static uint32_t exc_start_time; /* Time of task->exception transition */
-static uint32_t exc_end_time; /* Time of exception->task transition */
-static uint64_t exc_total_time; /* Total time in exceptions */
-static uint32_t svc_calls; /* Number of service calls */
-static uint32_t task_switches; /* Number of times active task changed */
-static uint32_t irq_dist[CONFIG_IRQ_COUNT]; /* Distribution of IRQ calls */
+static uint32_t exc_start_time; /* Time of task->exception transition */
+static uint32_t exc_end_time; /* Time of exception->task transition */
+static uint64_t exc_total_time; /* Total time in exceptions */
+static uint32_t svc_calls; /* Number of service calls */
+static uint32_t task_switches; /* Number of times active task changed */
+static uint32_t irq_dist[CONFIG_IRQ_COUNT]; /* Distribution of IRQ calls */
#endif
extern int __task_start(void);
@@ -96,41 +96,36 @@ static void task_exit_trap(void)
}
/* Startup parameters for all tasks. */
-#define TASK(n, r, d, s) { \
- .a0 = (uint32_t)d, \
- .pc = (uint32_t)r, \
- .stack_size = s, \
-},
+#define TASK(n, r, d, s) \
+ { \
+ .a0 = (uint32_t)d, \
+ .pc = (uint32_t)r, \
+ .stack_size = s, \
+ },
static const struct {
uint32_t a0;
uint32_t pc;
uint16_t stack_size;
-} tasks_init[] = {
- TASK(IDLE, __idle, 0, IDLE_TASK_STACK_SIZE)
- CONFIG_TASK_LIST
- CONFIG_TEST_TASK_LIST
-};
+} tasks_init[] = { TASK(IDLE, __idle, 0, IDLE_TASK_STACK_SIZE)
+ CONFIG_TASK_LIST CONFIG_TEST_TASK_LIST };
#undef TASK
/* Contexts for all tasks */
-static task_ tasks[TASK_ID_COUNT] __attribute__ ((section(".bss.tasks")));
+static task_ tasks[TASK_ID_COUNT] __attribute__((section(".bss.tasks")));
/* Validity checks about static task invariants */
BUILD_ASSERT(TASK_ID_COUNT <= (sizeof(unsigned) * 8));
BUILD_ASSERT(TASK_ID_COUNT < (1 << (sizeof(task_id_t) * 8)));
/* Stacks for all tasks */
-#define TASK(n, r, d, s) + s
-uint8_t task_stacks[0
- TASK(IDLE, __idle, 0, IDLE_TASK_STACK_SIZE)
- CONFIG_TASK_LIST
- CONFIG_TEST_TASK_LIST
-] __aligned(8);
+#define TASK(n, r, d, s) +s
+uint8_t task_stacks[0 TASK(IDLE, __idle, 0, IDLE_TASK_STACK_SIZE)
+ CONFIG_TASK_LIST CONFIG_TEST_TASK_LIST] __aligned(8);
#undef TASK
/* Reserve space to discard context on first context switch. */
-uint32_t scratchpad[TASK_SCRATCHPAD_SIZE] __attribute__
- ((section(".bss.task_scratchpad")));
+uint32_t scratchpad[TASK_SCRATCHPAD_SIZE]
+ __attribute__((section(".bss.task_scratchpad")));
task_ *current_task = (task_ *)scratchpad;
@@ -162,7 +157,7 @@ static atomic_t tasks_ready = BIT(TASK_ID_HOOKS);
*/
static atomic_t tasks_enabled = BIT(TASK_ID_HOOKS) | BIT(TASK_ID_IDLE);
-int start_called; /* Has task swapping started */
+int start_called; /* Has task swapping started */
/* in interrupt context */
volatile bool in_interrupt;
@@ -188,22 +183,22 @@ static inline task_ *__task_id_to_ptr(task_id_t id)
void __ram_code interrupt_disable(void)
{
/* bit11: disable MEIE */
- asm volatile ("li t0, 0x800");
- asm volatile ("csrc mie, t0");
+ asm volatile("li t0, 0x800");
+ asm volatile("csrc mie, t0");
}
void __ram_code interrupt_enable(void)
{
/* bit11: enable MEIE */
- asm volatile ("li t0, 0x800");
- asm volatile ("csrs mie, t0");
+ asm volatile("li t0, 0x800");
+ asm volatile("csrs mie, t0");
}
inline bool is_interrupt_enabled(void)
{
int mie = 0;
- asm volatile ("csrr %0, mie" : "=r"(mie));
+ asm volatile("csrr %0, mie" : "=r"(mie));
/* Check if MEIE bit is set in MIE register */
return mie & 0x800;
@@ -229,7 +224,7 @@ task_id_t __ram_code task_get_current(void)
return current_task - tasks;
}
-atomic_t * __ram_code task_get_event_bitmap(task_id_t tskid)
+atomic_t *__ram_code task_get_event_bitmap(task_id_t tskid)
{
task_ *tsk = __task_id_to_ptr(tskid);
@@ -247,7 +242,7 @@ int task_start_called(void)
* Also includes emulation of software triggering interrupt vector
*/
void __ram_code __keep syscall_handler(int desched, task_id_t resched,
- int swirq)
+ int swirq)
{
/* are we emulating an interrupt ? */
if (swirq) {
@@ -279,14 +274,14 @@ void __ram_code __keep syscall_handler(int desched, task_id_t resched,
set_mepc(get_mepc() + 4);
}
-task_ * __ram_code next_sched_task(void)
+task_ *__ram_code next_sched_task(void)
{
task_ *new_task = __task_id_to_ptr(__fls(tasks_ready & tasks_enabled));
#ifdef CONFIG_TASK_PROFILING
if (current_task != new_task) {
current_task->runtime +=
- (exc_start_time - exc_end_time - exc_sub_time);
+ (exc_start_time - exc_end_time - exc_sub_time);
task_will_switch = 1;
}
#endif
@@ -466,14 +461,14 @@ uint32_t __ram_code read_clear_int_mask(void)
uint32_t mie, meie = BIT(11);
/* Read and clear MEIE bit of MIE register. */
- asm volatile ("csrrc %0, mie, %1" : "=r"(mie) : "r"(meie));
+ asm volatile("csrrc %0, mie, %1" : "=r"(mie) : "r"(meie));
return mie;
}
void __ram_code set_int_mask(uint32_t val)
{
- asm volatile ("csrw mie, %0" : : "r"(val));
+ asm volatile("csrw mie, %0" : : "r"(val));
}
void task_enable_all_tasks(void)
@@ -553,12 +548,12 @@ void __ram_code mutex_lock(struct mutex *mtx)
atomic_or(&mtx->waiters, id);
while (1) {
- asm volatile (
+ asm volatile(
/* set lock value */
"li %0, 2\n\t"
/* attempt to acquire lock */
"amoswap.w.aq %0, %0, %1\n\t"
- : "=&r" (locked), "+A" (mtx->lock));
+ : "=&r"(locked), "+A"(mtx->lock));
/* we got it ! */
if (!locked)
break;
@@ -576,9 +571,7 @@ void __ram_code mutex_unlock(struct mutex *mtx)
task_ *tsk = current_task;
/* give back the lock */
- asm volatile (
- "amoswap.w.aqrl zero, zero, %0\n\t"
- : "+A" (mtx->lock));
+ asm volatile("amoswap.w.aqrl zero, zero, %0\n\t" : "+A"(mtx->lock));
waiters = mtx->waiters;
while (waiters) {
@@ -618,7 +611,7 @@ void task_print_list(void)
}
}
-static int command_task_info(int argc, char **argv)
+static int command_task_info(int argc, const char **argv)
{
#ifdef CONFIG_TASK_PROFILING
unsigned int total = 0;
@@ -648,11 +641,9 @@ static int command_task_info(int argc, char **argv)
return EC_SUCCESS;
}
-DECLARE_CONSOLE_COMMAND(taskinfo, command_task_info,
- NULL,
- "Print task info");
+DECLARE_CONSOLE_COMMAND(taskinfo, command_task_info, NULL, "Print task info");
-static int command_task_ready(int argc, char **argv)
+static int command_task_ready(int argc, const char **argv)
{
if (argc < 2) {
ccprintf("tasks_ready: 0x%08x\n", (int)tasks_ready);
@@ -664,8 +655,7 @@ static int command_task_ready(int argc, char **argv)
return EC_SUCCESS;
}
-DECLARE_CONSOLE_COMMAND(taskready, command_task_ready,
- "[setmask]",
+DECLARE_CONSOLE_COMMAND(taskready, command_task_ready, "[setmask]",
"Print/set ready tasks");
void task_pre_init(void)
@@ -688,9 +678,10 @@ void task_pre_init(void)
tasks[i].sp = (uint32_t)sp;
/* Initial context on stack (see __switchto()) */
- sp[TASK_SCRATCHPAD_SIZE-2] = tasks_init[i].a0; /* a0 */
- sp[TASK_SCRATCHPAD_SIZE-1] = (uint32_t)task_exit_trap; /* ra */
- sp[0] = tasks_init[i].pc; /* pc/mepc */
+ sp[TASK_SCRATCHPAD_SIZE - 2] = tasks_init[i].a0; /* a0 */
+ sp[TASK_SCRATCHPAD_SIZE - 1] = (uint32_t)task_exit_trap; /* ra
+ */
+ sp[0] = tasks_init[i].pc; /* pc/mepc */
/* Fill unused stack; also used to detect stack overflow. */
for (sp = stack_next; sp < (uint32_t *)tasks[i].sp; sp++)
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