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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
* Copyright (C) 2015-2016 Intel Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <program_loading.h>
#include <cbmem.h>
/*
* Romstage needs quite a bit of stack for decompressing images since the lzma
* lib keeps its state on the stack during romstage.
*/
#define ROMSTAGE_RAM_STACK_SIZE 0x5000
uintptr_t romstage_ram_stack_base(size_t size, int src)
{
/* cbmem_add() does a find() before add(). */
if (src == ROMSTAGE_STACK_CBMEM)
return (uintptr_t)cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK, size);
if (src == ROMSTAGE_STACK_LOW_MEM)
return CONFIG_RAMTOP - size;
return 0;
}
uintptr_t romstage_ram_stack_bottom(void)
{
return romstage_ram_stack_base(ROMSTAGE_RAM_STACK_SIZE,
ROMSTAGE_STACK_CBMEM);
}
uintptr_t romstage_ram_stack_top(void)
{
uintptr_t stack_top = romstage_ram_stack_base(ROMSTAGE_RAM_STACK_SIZE,
ROMSTAGE_STACK_CBMEM);
stack_top += ROMSTAGE_RAM_STACK_SIZE;
/* Make it aligned to a 8-byte boundary. */
stack_top = ALIGN_DOWN(stack_top, 8);
return stack_top;
}
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