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sparc32: introduce sparc32_start_kernel called from head_32.S

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This gives us a C hook before we call start_kernel()

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2012-05-25 21:20:08 +00:00 • committed by David S. Miller
parent 30005efc98
commit 4efb55e691
3 changed files with 15 additions and 8 deletions
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10
arch/sparc/kernel/head_32.S
View file

@ -661,16 +661,10 @@ continue_boot:
wr %g3, PSR_ET, %psr wr %g3, PSR_ET, %psr
WRITE_PAUSE WRITE_PAUSE
/* First we call prom_init() to set up PROMLIB, then /* Call sparc32_start_kernel(struct linux_romvec *rp) */
* off to start_kernel().
*/
sethi %hi(prom_vector_p), %g5 sethi %hi(prom_vector_p), %g5
ld [%g5 + %lo(prom_vector_p)], %o0 ld [%g5 + %lo(prom_vector_p)], %o0
call prom_init call sparc32_start_kernel
nop
call start_kernel
nop nop
/* We should not get here. */ /* We should not get here. */

3
arch/sparc/kernel/kernel.h
View file

@ -26,6 +26,9 @@ static inline unsigned long kimage_addr_to_ra(const char *p)
#endif #endif
#ifdef CONFIG_SPARC32 #ifdef CONFIG_SPARC32
/* setup_32.c */
void sparc32_start_kernel(struct linux_romvec *rp);
/* cpu.c */ /* cpu.c */
extern void cpu_probe(void); extern void cpu_probe(void);

10
arch/sparc/kernel/setup_32.c
View file

@ -32,6 +32,7 @@
#include <linux/cpu.h> #include <linux/cpu.h>
#include <linux/kdebug.h> #include <linux/kdebug.h>
#include <linux/export.h> #include <linux/export.h>
#include <linux/start_kernel.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/processor.h> #include <asm/processor.h>
@ -244,6 +245,15 @@ struct tt_entry *sparc_ttable;
struct pt_regs fake_swapper_regs; struct pt_regs fake_swapper_regs;
/* Called from head_32.S - before we have setup anything
* in the kernel. Be very careful with what you do here.
*/
void __init sparc32_start_kernel(struct linux_romvec *rp)
{
prom_init(rp);
start_kernel();
}
void __init setup_arch(char **cmdline_p) void __init setup_arch(char **cmdline_p)
{ {
int i; int i;