From: Sia Jee Heng <jeeheng.sia@starfivetech.com>
To: <paul.walmsley@sifive.com>, <palmer@dabbelt.com>,
<aou@eecs.berkeley.edu>
Cc: <linux-riscv@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
<jeeheng.sia@starfivetech.com>, <leyfoon.tan@starfivetech.com>,
<mason.huo@starfivetech.com>
Subject: [PATCH v2 1/3] RISC-V: Change suspend_save_csrs and suspend_restore_csrs to public function
Date: Mon, 9 Jan 2023 14:24:05 +0800 [thread overview]
Message-ID: <20230109062407.3235-2-jeeheng.sia@starfivetech.com> (raw)
In-Reply-To: <20230109062407.3235-1-jeeheng.sia@starfivetech.com>
Currently suspend_save_csrs() and suspend_restore_csrs() functions are
statically defined in the suspend.c. Change the function's attribute
to public so that the functions can be used by hibernation as well.
Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
Reviewed-by: Mason Huo <mason.huo@starfivetech.com>
---
arch/riscv/include/asm/suspend.h | 3 +++
arch/riscv/kernel/suspend.c | 4 ++--
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/include/asm/suspend.h b/arch/riscv/include/asm/suspend.h
index 8be391c2aecb..75419c5ca272 100644
--- a/arch/riscv/include/asm/suspend.h
+++ b/arch/riscv/include/asm/suspend.h
@@ -33,4 +33,7 @@ int cpu_suspend(unsigned long arg,
/* Low-level CPU resume entry function */
int __cpu_resume_enter(unsigned long hartid, unsigned long context);
+/* Used to save and restore the csr */
+void suspend_save_csrs(struct suspend_context *context);
+void suspend_restore_csrs(struct suspend_context *context);
#endif
diff --git a/arch/riscv/kernel/suspend.c b/arch/riscv/kernel/suspend.c
index 9ba24fb8cc93..3c89b8ec69c4 100644
--- a/arch/riscv/kernel/suspend.c
+++ b/arch/riscv/kernel/suspend.c
@@ -8,7 +8,7 @@
#include <asm/csr.h>
#include <asm/suspend.h>
-static void suspend_save_csrs(struct suspend_context *context)
+void suspend_save_csrs(struct suspend_context *context)
{
context->scratch = csr_read(CSR_SCRATCH);
context->tvec = csr_read(CSR_TVEC);
@@ -29,7 +29,7 @@ static void suspend_save_csrs(struct suspend_context *context)
#endif
}
-static void suspend_restore_csrs(struct suspend_context *context)
+void suspend_restore_csrs(struct suspend_context *context)
{
csr_write(CSR_SCRATCH, context->scratch);
csr_write(CSR_TVEC, context->tvec);
--
2.34.1
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next prev parent reply other threads:[~2023-01-09 6:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 6:24 [PATCH v2 0/3] RISC-V Hibernation Support Sia Jee Heng
2023-01-09 6:24 ` Sia Jee Heng [this message]
2023-01-09 6:24 ` [PATCH v2 2/3] RISC-V: mm: Enable huge page support to kernel_page_present() function Sia Jee Heng
2023-01-09 14:45 ` Andrew Jones
2023-01-10 6:45 ` JeeHeng Sia
2023-01-10 6:59 ` Andrew Jones
2023-01-09 6:24 ` [PATCH v2 3/3] RISC-V: Add arch functions to support hibernation/suspend-to-disk Sia Jee Heng
2023-01-09 19:36 ` Andrew Jones
2023-01-09 19:46 ` Conor Dooley
2023-01-10 7:00 ` JeeHeng Sia
2023-01-10 7:22 ` Andrew Jones
2023-01-10 3:16 ` Leyfoon Tan
2023-01-10 8:37 ` JeeHeng Sia
2023-01-10 9:08 ` Andrew Jones
2023-01-10 20:22 ` Conor Dooley
2023-01-11 5:05 ` JeeHeng Sia
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