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lib: sbi: Add optional resume address to hart suspend

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Add an optional resume address to the platform specific hart suspend call.

Signed-off-by: Subrahmanya Lingappa <slingappa@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Subrahmanya Lingappa
2024-08-06 10:38:46 +05:30
committed by Anup Patel
parent 13f55f33a1
commit fdd7263536
3 changed files with 9 additions and 5 deletions
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6
include/sbi/sbi_hsm.h
View File

@@ -40,8 +40,12 @@ struct sbi_hsm_device {
* *
* For successful non-retentive suspend, the hart will resume from * For successful non-retentive suspend, the hart will resume from
* the warm boot entry point. * the warm boot entry point.
*
* NOTE: mmode_resume_addr(resume address) is optional hence it
* may or may not be honored by the platform. If its not honored
* then platform must ensure to resume from the warmboot address.
*/ */
int (*hart_suspend)(u32 suspend_type); int (*hart_suspend)(u32 suspend_type, ulong mmode_resume_addr);
/** /**
* Perform platform-specific actions to resume from a suspended state. * Perform platform-specific actions to resume from a suspended state.

6
lib/sbi/sbi_hsm.c
View File

@@ -223,10 +223,10 @@ static int hsm_device_hart_stop(void)
return SBI_ENOTSUPP; return SBI_ENOTSUPP;
} }
static int hsm_device_hart_suspend(u32 suspend_type) static int hsm_device_hart_suspend(u32 suspend_type, ulong mmode_resume_addr)
{ {
if (hsm_dev && hsm_dev->hart_suspend) if (hsm_dev && hsm_dev->hart_suspend)
return hsm_dev->hart_suspend(suspend_type); return hsm_dev->hart_suspend(suspend_type, mmode_resume_addr);
return SBI_ENOTSUPP; return SBI_ENOTSUPP;
} }
@@ -532,7 +532,7 @@ int sbi_hsm_hart_suspend(struct sbi_scratch *scratch, u32 suspend_type,
__sbi_hsm_suspend_non_ret_save(scratch); __sbi_hsm_suspend_non_ret_save(scratch);
/* Try platform specific suspend */ /* Try platform specific suspend */
ret = hsm_device_hart_suspend(suspend_type); ret = hsm_device_hart_suspend(suspend_type, scratch->warmboot_addr);
if (ret == SBI_ENOTSUPP) { if (ret == SBI_ENOTSUPP) {
/* Try generic implementation of default suspend types */ /* Try generic implementation of default suspend types */
if (suspend_type == SBI_HSM_SUSPEND_RET_DEFAULT || if (suspend_type == SBI_HSM_SUSPEND_RET_DEFAULT ||

2
platform/generic/allwinner/sun20i-d1.c
View File

@@ -130,7 +130,7 @@ static void sun20i_d1_riscv_cfg_init(void)
writel_relaxed(entry >> 32, SUN20I_D1_RISCV_CFG_BASE + RESET_ENTRY_HI_REG); writel_relaxed(entry >> 32, SUN20I_D1_RISCV_CFG_BASE + RESET_ENTRY_HI_REG);
} }
static int sun20i_d1_hart_suspend(u32 suspend_type) static int sun20i_d1_hart_suspend(u32 suspend_type, ulong mmode_resume_addr)
{ {
/* Use the generic code for retentive suspend. */ /* Use the generic code for retentive suspend. */
if (!(suspend_type & SBI_HSM_SUSP_NON_RET_BIT)) if (!(suspend_type & SBI_HSM_SUSP_NON_RET_BIT))