在2024年6月16日六月 下午12:01，Heinrich Schuchardt写道：
On 5/22/24 17:34, Jiaxun Yang wrote:
Add some common library routines for the architecture.
Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com
arch/loongarch/lib/Makefile | 7 ++++ arch/loongarch/lib/asm-offsets.c | 66 ++++++++++++++++++++++++++++++++++++ arch/loongarch/lib/boot.c | 14 ++++++++ arch/loongarch/lib/cache.c | 73 ++++++++++++++++++++++++++++++++++++++++ arch/loongarch/lib/reset.c | 14 ++++++++ arch/loongarch/lib/setjmp.S | 52 ++++++++++++++++++++++++++++ 6 files changed, 226 insertions(+)
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile index 3dbed94cc624..3c17b9cd85af 100644 --- a/arch/loongarch/lib/Makefile +++ b/arch/loongarch/lib/Makefile @@ -3,3 +3,10 @@ # Copyright (C) 2024 Jiaxun yang jiaxun.yang@flygoat.com #
+obj-$(CONFIG_CMD_GO) += boot.o +obj-y += cache.o +obj-y += interrupts.o +ifeq ($(CONFIG_$(SPL_)SYSRESET),) +obj-y += reset.o +endif +obj-y += setjmp.o diff --git a/arch/loongarch/lib/asm-offsets.c b/arch/loongarch/lib/asm-offsets.c new file mode 100644 index 000000000000..e3f4c629b63d --- /dev/null +++ b/arch/loongarch/lib/asm-offsets.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- Copyright (C) 2024 Jiaxun Yang jiaxun.yang@flygoat.com
- From arch/x86/lib/asm-offsets.c
- This program is used to generate definitions needed by
- assembly language modules.
- */
+#include <asm/global_data.h> +#include <asm/ptrace.h> +#include <linux/kbuild.h>
+static void __used output_ptreg_defines(void) +{
- COMMENT("LoongArch pt_regs offsets.");
- OFFSET(PT_R0, pt_regs, regs[0]);
- OFFSET(PT_R1, pt_regs, regs[1]);
- OFFSET(PT_R2, pt_regs, regs[2]);
- OFFSET(PT_R3, pt_regs, regs[3]);
- OFFSET(PT_R4, pt_regs, regs[4]);
- OFFSET(PT_R5, pt_regs, regs[5]);
- OFFSET(PT_R6, pt_regs, regs[6]);
- OFFSET(PT_R7, pt_regs, regs[7]);
- OFFSET(PT_R8, pt_regs, regs[8]);
- OFFSET(PT_R9, pt_regs, regs[9]);
- OFFSET(PT_R10, pt_regs, regs[10]);
- OFFSET(PT_R11, pt_regs, regs[11]);
- OFFSET(PT_R12, pt_regs, regs[12]);
- OFFSET(PT_R13, pt_regs, regs[13]);
- OFFSET(PT_R14, pt_regs, regs[14]);
- OFFSET(PT_R15, pt_regs, regs[15]);
- OFFSET(PT_R16, pt_regs, regs[16]);
- OFFSET(PT_R17, pt_regs, regs[17]);
- OFFSET(PT_R18, pt_regs, regs[18]);
- OFFSET(PT_R19, pt_regs, regs[19]);
- OFFSET(PT_R20, pt_regs, regs[20]);
- OFFSET(PT_R21, pt_regs, regs[21]);
- OFFSET(PT_R22, pt_regs, regs[22]);
- OFFSET(PT_R23, pt_regs, regs[23]);
- OFFSET(PT_R24, pt_regs, regs[24]);
- OFFSET(PT_R25, pt_regs, regs[25]);
- OFFSET(PT_R26, pt_regs, regs[26]);
- OFFSET(PT_R27, pt_regs, regs[27]);
- OFFSET(PT_R28, pt_regs, regs[28]);
- OFFSET(PT_R29, pt_regs, regs[29]);
- OFFSET(PT_R30, pt_regs, regs[30]);
- OFFSET(PT_R31, pt_regs, regs[31]);
- OFFSET(PT_CRMD, pt_regs, csr_crmd);
- OFFSET(PT_PRMD, pt_regs, csr_prmd);
- OFFSET(PT_EUEN, pt_regs, csr_euen);
- OFFSET(PT_ECFG, pt_regs, csr_ecfg);
- OFFSET(PT_ESTAT, pt_regs, csr_estat);
- OFFSET(PT_ERA, pt_regs, csr_era);
- OFFSET(PT_BVADDR, pt_regs, csr_badvaddr);
- OFFSET(PT_ORIG_A0, pt_regs, orig_a0);
- DEFINE(PT_SIZE, sizeof(struct pt_regs));
- BLANK();
+}
+int main(void) +{
- output_ptreg_defines();
- return 0;
+} diff --git a/arch/loongarch/lib/boot.c b/arch/loongarch/lib/boot.c new file mode 100644 index 000000000000..327be16bb59f --- /dev/null +++ b/arch/loongarch/lib/boot.c @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- Copyright (C) 2024 Jiaxun Yang jiaxun.yang@flygoat.com
- */
+#include <asm/u-boot.h>
+unsigned long do_go_exec(ulong (*entry)(int, char * const []),
int argc, char *const argv[])+{
- cleanup_before_linux();
- return entry(argc, argv);
+} diff --git a/arch/loongarch/lib/cache.c b/arch/loongarch/lib/cache.c new file mode 100644 index 000000000000..54566edef8a3 --- /dev/null +++ b/arch/loongarch/lib/cache.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- Copyright (C) 2024 Jiaxun Yang jiaxun.yang@flygoat.com
- */
+#include <cpu_func.h> +#include <asm/cache.h> +#include <asm/loongarch.h>
+void invalidate_icache_all(void) +{
- asm volatile ("\tibar 0\n"::);
According to https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#_d... this is not invalidating the instruction cache.
After loading an image into memory and before executing it we must invalidate the instruction cache to ensure that the newly loaded code is executed.
I guess you want to use CACOP here.
Yes, I haven't thought about that yet :-( As this series is only concerning QEMU machine, I left all cache stuff blank.
I'll add it to future TODOs.
Thanks - Jiaxun
+}
+__weak void flush_dcache_all(void)
In cmd/cache.c we have another __weak implementation. How is the linke:w meant to know which one to use?
I guess we need to fix cmd/cache.c. But that is beyond the scope of this series.
+{
- asm volatile ("\tdbar 0\n"::);
CACOP?
Best regards
Heinrich