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x86: Add a default implementation for cleanup_before_linux()

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This function provides an opportunity for some last minute cleanup and
reconfiguration before control is handed over to Linux. It's possible this
may need to do something in the future, but for now it's left empty. It's set
up as a weak symbol so it can be overridden if necessary on a case by case
basis.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Gabe Black 2012-10-20 12:33:10 +00:00 committed by Simon Glass
parent 9ad4736e32
commit f30fc4de41
2 changed files with 6 additions and 0 deletions
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5
arch/x86/cpu/cpu.c
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@ -115,6 +115,11 @@ void setup_gdt(gd_t *id, u64 *gdt_addr)
load_fs(X86_GDT_ENTRY_32BIT_FS);
}
int __weak x86_cleanup_before_linux(void)
{
return 0;
}
int x86_cpu_init_f(void)
{
const u32 em_rst = ~X86_CR0_EM;

1
arch/x86/include/asm/u-boot-x86.h
View file

@ -40,6 +40,7 @@ int cpu_init_f(void);
void init_gd(gd_t *id, u64 *gdt_addr);
void setup_gdt(gd_t *id, u64 *gdt_addr);
int init_cache(void);
int cleanup_before_linux(void);
/* cpu/.../timer.c */
void timer_isr(void *);