ca0606e04f
This change does the following: * Pushes the cpu_info struct into the top of the stack (just like c_start.S). This is required so the cpu_info function works correctly. * Adds the thread.c to the romstage build. I only enabled this for romstage since I haven't done any tests in other stages, but in theory it should work for other stages. BUG=b:179699789 TEST=Boot guybrush with threads enabled in romstage Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: I8e32e1c54dea0d0c85dd6d6753147099aa54b9b5 Reviewed-on: https://review.coreboot.org/c/coreboot/+/56494 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
79 lines
1.4 KiB
ArmAsm
79 lines
1.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <rules.h>
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/*
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* This path is for stages that are post bootblock. The gdt is reloaded
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* to accommodate platforms that are executing out of CAR. In order to
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* continue with C code execution one needs to set stack pointer and
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* clear .bss variables that are stage specific.
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*/
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#if CONFIG(RESET_VECTOR_IN_RAM)
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#define _STACK_TOP _eearlyram_stack
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#else
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#define _STACK_TOP _ecar_stack
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#endif
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#if ENV_X86_64
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.code64
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#else
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.code32
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#endif
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.section ".text._start", "ax", @progbits
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.global _start
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_start:
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/* Migrate GDT to this text segment */
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#if ENV_X86_64
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call gdt_init64
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#else
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call gdt_init
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#endif
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/* reset stack pointer to CAR/EARLYRAM stack */
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mov $_STACK_TOP, %esp
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#if CONFIG(COOP_MULTITASKING)
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/* Push the thread pointer. */
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push $0
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#endif
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/* Push the CPU index and struct CPU */
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push $0
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push $0
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/* clear .bss section as it is not shared */
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cld
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xor %eax, %eax
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movl $(_ebss), %ecx
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movl $(_bss), %edi
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sub %edi, %ecx
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shrl $2, %ecx
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rep stosl
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#if ((ENV_SEPARATE_VERSTAGE && CONFIG(VERSTAGE_DEBUG_SPINLOOP)) \
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|| (ENV_ROMSTAGE && CONFIG(ROMSTAGE_DEBUG_SPINLOOP)))
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/* Wait for a JTAG debugger to break in and set EBX non-zero */
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xor %ebx, %ebx
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debug_spinloop:
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cmp $0, %ebx
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jz debug_spinloop
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#endif
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andl $0xfffffff0, %esp
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#if CONFIG(IDT_IN_EVERY_STAGE)
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call exception_init
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#endif
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#if CONFIG(ASAN_IN_ROMSTAGE)
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call asan_init
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#endif
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call car_stage_entry
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/* Expect to never return. */
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1:
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jmp 1b
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