Set the warmboot address using an SCM call, only if the new address is
different than the old one.
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
---
drivers/soc/qcom/scm-boot.c | 22 ++++++++++++++++++++++
include/soc/qcom/scm-boot.h | 1 +
2 files changed, 23 insertions(+)
diff --git a/drivers/soc/qcom/scm-boot.c b/drivers/soc/qcom/scm-boot.c
index 60ff7b4..5710967 100644
--- a/drivers/soc/qcom/scm-boot.c
+++ b/drivers/soc/qcom/scm-boot.c
@@ -37,3 +37,25 @@ int scm_set_boot_addr(phys_addr_t addr, int flags)
&cmd, sizeof(cmd), NULL, 0);
}
EXPORT_SYMBOL(scm_set_boot_addr);
+
+
+int scm_set_warm_boot_addr(void *entry, int cpu)
+{
+ static int flags[NR_CPUS] = {
+ SCM_FLAG_WARMBOOT_CPU0,
+ SCM_FLAG_WARMBOOT_CPU1,
+ SCM_FLAG_WARMBOOT_CPU2,
+ SCM_FLAG_WARMBOOT_CPU3,
+ };
+ static DEFINE_PER_CPU(void *, last_known_entry);
+ int ret;
+
+ if (entry == per_cpu(last_known_entry, cpu))
+ return 0;
+
+ ret = scm_set_boot_addr(virt_to_phys(entry), flags[cpu]);
+ if (!ret)
+ per_cpu(last_known_entry, cpu) = entry;
+
+ return ret;
+}
diff --git a/include/soc/qcom/scm-boot.h b/include/soc/qcom/scm-boot.h
index 02b445c..100938b 100644
--- a/include/soc/qcom/scm-boot.h
+++ b/include/soc/qcom/scm-boot.h
@@ -22,5 +22,6 @@
#define SCM_FLAG_WARMBOOT_CPU3 0x40
int scm_set_boot_addr(phys_addr_t addr, int flags);
+int scm_set_warm_boot_addr(void *entry, int cpu);
#endif
--
2.1.0
--
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