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| author | Tom Rini <trini@konsulko.com> | 2023-10-05 13:26:44 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-10-05 13:26:44 -0400 |
| commit | be2abe73df58a35da9e8d5afb13fccdf1b0faa8e (patch) | |
| tree | a41b676d6169cd846d33dcf18c8e8c6ea181784c /cmd/riscv/exception.c | |
| parent | cb59d23584a7a0f2431025a56f4938d424c49ca5 (diff) | |
| parent | 7cfdacbe8020292845bd5eba63b576b8586c433c (diff) | |
Merge https://source.denx.de/u-boot/custodians/u-boot-riscv
+ ae350: modify memory layout and target name
+ ae350: use generic RISC-V timer driver in S-mode
+ Support bootstage report for RISC-V
+ Support C extension exception command for RISC-V
+ Add Starfive timer support
Diffstat (limited to 'cmd/riscv/exception.c')
| -rw-r--r-- | cmd/riscv/exception.c | 34 |
1 files changed, 31 insertions, 3 deletions
diff --git a/cmd/riscv/exception.c b/cmd/riscv/exception.c index 7a08061d120..f38f454a0b1 100644 --- a/cmd/riscv/exception.c +++ b/cmd/riscv/exception.c @@ -8,6 +8,15 @@ #include <common.h> #include <command.h> +static int do_compressed(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + /* c.li a0, 0; c.li a0, 0 */ + asm volatile (".long 0x45014501\n"); + printf("The system supports compressed instructions.\n"); + return CMD_RET_SUCCESS; +} + static int do_ebreak(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { @@ -15,6 +24,19 @@ static int do_ebreak(struct cmd_tbl *cmdtp, int flag, int argc, return CMD_RET_FAILURE; } +static int do_ialign16(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + asm volatile ( + /* jump skipping 2 bytes */ + ".long 0x0060006f\n" + ".long 0x006f0000\n" + ".long 0x00000060\n" + ); + printf("The system supports 16 bit aligned instructions.\n"); + return CMD_RET_SUCCESS; +} + static int do_unaligned(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { @@ -35,8 +57,12 @@ static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc, } static struct cmd_tbl cmd_sub[] = { + U_BOOT_CMD_MKENT(compressed, CONFIG_SYS_MAXARGS, 1, do_compressed, + "", ""), U_BOOT_CMD_MKENT(ebreak, CONFIG_SYS_MAXARGS, 1, do_ebreak, "", ""), + U_BOOT_CMD_MKENT(ialign16, CONFIG_SYS_MAXARGS, 1, do_ialign16, + "", ""), U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned, "", ""), U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined, @@ -46,9 +72,11 @@ static struct cmd_tbl cmd_sub[] = { static char exception_help_text[] = "<ex>\n" " The following exceptions are available:\n" - " ebreak - breakpoint\n" - " undefined - illegal instruction\n" - " unaligned - load address misaligned\n" + " compressed - compressed instruction\n" + " ebreak - breakpoint\n" + " ialign16 - 16 bit aligned instruction\n" + " undefined - illegal instruction\n" + " unaligned - load address misaligned\n" ; #include <exception.h> |