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arm: zynq: Invalidate L1 in secondary boot

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During boot, Linux initiates a clean-invalidate operation only, resulting
in faulty data to be written to the memory system during resume.
Therefore invalidate the L1 in the secondary boot path to avoid these
issues.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Soren Brinkmann 2013-10-31 09:10:15 -07:00 committed by Michal Simek
parent 11e031308b
commit 6a37ff388a
3 changed files with 8 additions and 2 deletions
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2
arch/arm/mach-zynq/common.h
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@ -17,6 +17,8 @@
#ifndef __MACH_ZYNQ_COMMON_H__ #ifndef __MACH_ZYNQ_COMMON_H__
#define __MACH_ZYNQ_COMMON_H__ #define __MACH_ZYNQ_COMMON_H__
void zynq_secondary_startup(void);
extern int zynq_slcr_init(void); extern int zynq_slcr_init(void);
extern void zynq_slcr_system_reset(void); extern void zynq_slcr_system_reset(void);
extern void zynq_slcr_cpu_stop(int cpu); extern void zynq_slcr_cpu_stop(int cpu);

6
arch/arm/mach-zynq/headsmp.S
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@ -18,5 +18,9 @@ zynq_secondary_trampoline_jump:
.word /* cpu 1 */ .word /* cpu 1 */
.globl zynq_secondary_trampoline_end .globl zynq_secondary_trampoline_end
zynq_secondary_trampoline_end: zynq_secondary_trampoline_end:
ENDPROC(zynq_secondary_trampoline) ENDPROC(zynq_secondary_trampoline)
ENTRY(zynq_secondary_startup)
bl v7_invalidate_l1
b secondary_startup
ENDPROC(zynq_secondary_startup)

2
arch/arm/mach-zynq/platsmp.c
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@ -90,7 +90,7 @@ EXPORT_SYMBOL(zynq_cpun_start);
static int zynq_boot_secondary(unsigned int cpu, static int zynq_boot_secondary(unsigned int cpu,
struct task_struct *idle) struct task_struct *idle)
{ {
return zynq_cpun_start(virt_to_phys(secondary_startup), cpu); return zynq_cpun_start(virt_to_phys(zynq_secondary_startup), cpu);
} }
/* /*