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