[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] xen/riscv: introduce stack stuff
commit 83d9679db057d5736c7b5a56db06bb6bb66c3914 Author: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> AuthorDate: Tue Jan 10 17:17:56 2023 +0200 Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> CommitDate: Wed Jan 11 23:46:12 2023 +0000 xen/riscv: introduce stack stuff The patch introduces and sets up a stack in order to go to C environment Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> Reviewed-by: Alistair Francis <alistair.francis@xxxxxxx> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> --- xen/arch/riscv/Makefile | 1 + xen/arch/riscv/include/asm/config.h | 2 ++ xen/arch/riscv/riscv64/head.S | 6 +++++- xen/arch/riscv/setup.c | 14 ++++++++++++++ 4 files changed, 22 insertions(+), 1 deletion(-) diff --git a/xen/arch/riscv/Makefile b/xen/arch/riscv/Makefile index 248f2cbb3e..5a67a3f493 100644 --- a/xen/arch/riscv/Makefile +++ b/xen/arch/riscv/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_RISCV_64) += riscv64/ +obj-y += setup.o $(TARGET): $(TARGET)-syms $(OBJCOPY) -O binary -S $< $@ diff --git a/xen/arch/riscv/include/asm/config.h b/xen/arch/riscv/include/asm/config.h index 0370f865f3..763a922a04 100644 --- a/xen/arch/riscv/include/asm/config.h +++ b/xen/arch/riscv/include/asm/config.h @@ -43,6 +43,8 @@ #define SMP_CACHE_BYTES (1 << 6) +#define STACK_SIZE PAGE_SIZE + #endif /* __RISCV_CONFIG_H__ */ /* * Local variables: diff --git a/xen/arch/riscv/riscv64/head.S b/xen/arch/riscv/riscv64/head.S index 990edb70a0..d444dd8aad 100644 --- a/xen/arch/riscv/riscv64/head.S +++ b/xen/arch/riscv/riscv64/head.S @@ -1,4 +1,8 @@ .section .text.header, "ax", %progbits ENTRY(start) - j start + la sp, cpu0_boot_stack + li t0, STACK_SIZE + add sp, sp, t0 + + tail start_xen diff --git a/xen/arch/riscv/setup.c b/xen/arch/riscv/setup.c new file mode 100644 index 0000000000..13e24e2fe1 --- /dev/null +++ b/xen/arch/riscv/setup.c @@ -0,0 +1,14 @@ +#include <xen/compile.h> +#include <xen/init.h> + +/* Xen stack for bringing up the first CPU. */ +unsigned char __initdata cpu0_boot_stack[STACK_SIZE] + __aligned(STACK_SIZE); + +void __init noreturn start_xen(void) +{ + for ( ;; ) + asm volatile ("wfi"); + + unreachable(); +} -- generated by git-patchbot for /home/xen/git/xen.git#master
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