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/* Copyright 2015 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "debug_printf.h"
#include "link_defs.h"
#include "registers.h"
#include "setup.h"
/* Is there a system wide function for this? */
void halt(void)
{
while (1)
;
}
void checkBuildVersion(void)
{
uint32_t last_sync = GREG32(SWDP, P4_LAST_SYNC);
if (last_sync == GC_SWDP_P4_LAST_SYNC_DEFAULT)
return;
debug_printf("compiled for %u, not willing to run on %u\n",
GC_SWDP_P4_LAST_SYNC_DEFAULT, last_sync);
halt();
}
void unlockFlashForRW(void)
{
uint32_t text_end = ((uint32_t)(&__data_lma_start) +
(uint32_t)(&__data_end) -
(uint32_t)(&__data_start) +
CONFIG_FLASH_BANK_SIZE)
& ~(CONFIG_FLASH_BANK_SIZE - 1);
GREG32(GLOBALSEC, FLASH_REGION1_BASE_ADDR) = text_end;
GREG32(GLOBALSEC, FLASH_REGION1_SIZE) =
CONFIG_FLASH_SIZE - text_end - 1;
GWRITE_FIELD(GLOBALSEC, FLASH_REGION1_CTRL, EN, 1);
GWRITE_FIELD(GLOBALSEC, FLASH_REGION1_CTRL, RD_EN, 1);
GWRITE_FIELD(GLOBALSEC, FLASH_REGION1_CTRL, WR_EN, 0);
}
void disarmRAMGuards(void)
{
GWRITE_FIELD(GLOBALSEC, CPU0_D_REGION0_CTRL, EN, 1);
GWRITE_FIELD(GLOBALSEC, CPU0_D_REGION0_CTRL, RD_EN, 1);
GWRITE_FIELD(GLOBALSEC, CPU0_D_REGION0_CTRL, WR_EN, 1);
GWRITE_FIELD(GLOBALSEC, CPU0_D_REGION1_CTRL, EN, 1);
GWRITE_FIELD(GLOBALSEC, CPU0_D_REGION1_CTRL, RD_EN, 1);
GWRITE_FIELD(GLOBALSEC, CPU0_D_REGION1_CTRL, WR_EN, 1);
}
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