diff options
Diffstat (limited to 'src/arch/riscv/opensbi.c')
| -rw-r--r-- | src/arch/riscv/opensbi.c | 56 |
1 files changed, 34 insertions, 22 deletions
diff --git a/src/arch/riscv/opensbi.c b/src/arch/riscv/opensbi.c index bf26b2279e..36f2951559 100644 --- a/src/arch/riscv/opensbi.c +++ b/src/arch/riscv/opensbi.c @@ -1,13 +1,25 @@ /* SPDX-License-Identifier: GPL-2.0-only */ -/* OpenSBI wants to make its own definitions for some of our compiler.h macros. */ -#undef __packed -#undef __noreturn -#undef __aligned - -#include <sbi/fw_dynamic.h> #include <arch/boot.h> -/* DO NOT INCLUDE COREBOOT HEADERS HERE */ +#include <arch/encoding.h> +#include <stdint.h> +#include <stddef.h> + +#define FW_DYNAMIC_INFO_VERSION_2 2 +#define FW_DYNAMIC_INFO_MAGIC_VALUE 0x4942534f // "OSBI" + +/* + * structure passed to OpenSBI as 3rd argument + * NOTE: This structure may need to be updated when the OpenSBI submodule is updated. + */ +static struct __packed fw_dynamic_info { + unsigned long magic; // magic value "OSBI" + unsigned long version; // version number (2) + unsigned long next_addr; // Next booting stage address (payload address) + unsigned long next_mode; // Next booting stage mode (usually supervisor mode) + unsigned long options; // options for OpenSBI library + unsigned long boot_hart; // usually CONFIG_RISCV_WORKING_HARTID +} info; void run_opensbi(const int hart_id, const void *fdt, @@ -15,21 +27,21 @@ void run_opensbi(const int hart_id, const void *payload, const int payload_mode) { - struct fw_dynamic_info info = { - .magic = FW_DYNAMIC_INFO_MAGIC_VALUE, - .version = FW_DYNAMIC_INFO_VERSION_MAX, - .next_mode = payload_mode, - .next_addr = (uintptr_t)payload, - .options = 0, - .boot_hart = CONFIG_OPENSBI_FW_DYNAMIC_BOOT_HART, - }; + info.magic = FW_DYNAMIC_INFO_MAGIC_VALUE, + info.version = FW_DYNAMIC_INFO_VERSION_2, + info.next_mode = payload_mode, + info.next_addr = (uintptr_t)payload, + info.options = 0, + info.boot_hart = CONFIG_OPENSBI_FW_DYNAMIC_BOOT_HART, - csr_write(mepc, opensbi); + write_csr(mepc, opensbi); // set program counter to OpenSBI (jumped to with mret) asm volatile ( - "mv a0, %0\n\t" - "mv a1, %1\n\t" - "mv a2, %2\n\t" - "mret" : - : "r"(hart_id), "r"(fdt), "r"(&info) - : "a0", "a1", "a2"); + "mv a0, %0\n\t" + "mv a1, %1\n\t" + "mv a2, %2\n\t" + "mret" + : + : "r"(hart_id), "r"(fdt), "r"(&info) + : "a0", "a1", "a2" + ); } |