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authorMichal Simek <michal.simek@xilinx.com>2013-05-24 19:58:55 +0400
committerMichal Simek <michal.simek@xilinx.com>2013-06-17 09:35:31 +0400
commit88cd4e882de73c2e62c38591abfe8c13fcc8386a (patch)
tree928df494011ef788f535068e63bc13a68d180e00 /arch/arm/mach-zynq
parent7ac161c43506f60b07684bc8a98eeb50d8e8664c (diff)
downloadlinux-88cd4e882de73c2e62c38591abfe8c13fcc8386a.tar.xz
ARM: zynq: Not to rewrite jump code when starting address is 0x0
This configuration is used by remoteproc. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/arm/mach-zynq')
-rw-r--r--arch/arm/mach-zynq/platsmp.c52
1 files changed, 26 insertions, 26 deletions
diff --git a/arch/arm/mach-zynq/platsmp.c b/arch/arm/mach-zynq/platsmp.c
index 5fc167e07619..023f225493f2 100644
--- a/arch/arm/mach-zynq/platsmp.c
+++ b/arch/arm/mach-zynq/platsmp.c
@@ -53,34 +53,34 @@ int __cpuinit zynq_cpun_start(u32 address, int cpu)
&zynq_secondary_trampoline;
zynq_slcr_cpu_stop(cpu);
-
- if (__pa(PAGE_OFFSET)) {
- zero = ioremap(0, trampoline_code_size);
- if (!zero) {
- pr_warn("BOOTUP jump vectors not accessible\n");
- return -1;
+ if (address) {
+ if (__pa(PAGE_OFFSET)) {
+ zero = ioremap(0, trampoline_code_size);
+ if (!zero) {
+ pr_warn("BOOTUP jump vectors not accessible\n");
+ return -1;
+ }
+ } else {
+ zero = (__force u8 __iomem *)PAGE_OFFSET;
}
- } else {
- zero = (__force u8 __iomem *)PAGE_OFFSET;
- }
-
- /*
- * This is elegant way how to jump to any address
- * 0x0: Load address at 0x8 to r0
- * 0x4: Jump by mov instruction
- * 0x8: Jumping address
- */
- memcpy((__force void *)zero, &zynq_secondary_trampoline,
- trampoline_size);
- writel(address, zero + trampoline_size);
-
- flush_cache_all();
- outer_flush_range(0, trampoline_code_size);
- smp_wmb();
-
- if (__pa(PAGE_OFFSET))
- iounmap(zero);
+ /*
+ * This is elegant way how to jump to any address
+ * 0x0: Load address at 0x8 to r0
+ * 0x4: Jump by mov instruction
+ * 0x8: Jumping address
+ */
+ memcpy((__force void *)zero, &zynq_secondary_trampoline,
+ trampoline_size);
+ writel(address, zero + trampoline_size);
+
+ flush_cache_all();
+ outer_flush_range(0, trampoline_code_size);
+ smp_wmb();
+
+ if (__pa(PAGE_OFFSET))
+ iounmap(zero);
+ }
zynq_slcr_cpu_start(cpu);
return 0;