When implementing efi loader support, we can expose runtime services
for payloads. One such service is CPU reset.
This patch implements RTS CPU reset support for layerscape systems.
Signed-off-by: Alexander Graf <ag...@suse.de>
---
v4 -> v5:
- Use __efi_runtime tags
---
arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 33 +++++++++++++++++++++++++++++++--
1 file changed, 31 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index b7a2e0c..0b516e3 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -17,6 +17,7 @@
#ifdef CONFIG_MP
#include <asm/arch/mp.h>
#endif
+#include <efi_loader.h>
#include <fm_eth.h>
#include <fsl-mc/fsl_mc.h>
#ifdef CONFIG_FSL_ESDHC
@@ -462,9 +463,10 @@ int timer_init(void)
return 0;
}
-void reset_cpu(ulong addr)
+__efi_runtime_data u32 __iomem *rstcr = (u32 *)CONFIG_SYS_FSL_RST_ADDR;
+
+void __efi_runtime reset_cpu(ulong addr)
{
- u32 __iomem *rstcr = (u32 *)CONFIG_SYS_FSL_RST_ADDR;
u32 val;
/* Raise RESET_REQ_B */
@@ -473,6 +475,33 @@ void reset_cpu(ulong addr)
scfg_out32(rstcr, val);
}
+#ifdef CONFIG_EFI_LOADER
+
+void __efi_runtime EFIAPI efi_reset_system(
+ enum efi_reset_type reset_type,
+ efi_status_t reset_status,
+ unsigned long data_size, void *reset_data)
+{
+ switch (reset_type) {
+ case EFI_RESET_COLD:
+ case EFI_RESET_WARM:
+ reset_cpu(0);
+ break;
+ case EFI_RESET_SHUTDOWN:
+ /* Nothing we can do */
+ break;
+ }
+
+ while (1) { }
+}
+
+void efi_reset_system_init(void)
+{
+ efi_add_runtime_mmio(&rstcr, sizeof(*rstcr));
+}
+
+#endif
+
phys_size_t board_reserve_ram_top(phys_size_t ram_size)
{
phys_size_t ram_top = ram_size;
--
1.8.5.6
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