diff options
| author | Atish Patra <atish.patra@wdc.com> | 2019-11-24 23:33:46 -0800 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-12-23 09:12:11 +0530 |
| commit | 109266397a6d8a37f4450c5ff80ea3737a6acd3e (patch) | |
| tree | 1029e7a8ed1bc16ed50d52629b4a468093524fe4 /lib/sbi/sbi_ecall.c | |
| parent | aa0ed1d7338019af8c785274c99b13caa59ce1f5 (diff) | |
lib: Add TIME extension in SBI
This patch adds support for TIME extension which replaces v0.1
timer extension.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib/sbi/sbi_ecall.c')
| -rw-r--r-- | lib/sbi/sbi_ecall.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/lib/sbi/sbi_ecall.c b/lib/sbi/sbi_ecall.c index 58bce16..d472165 100644 --- a/lib/sbi/sbi_ecall.c +++ b/lib/sbi/sbi_ecall.c @@ -47,8 +47,9 @@ int sbi_check_extension(struct sbi_scratch *scratch, unsigned long extid, * TODO: Implement it. */ - if ((extid >= SBI_EXT_0_1_SET_TIMER && - extid <= SBI_EXT_0_1_SHUTDOWN) || (extid == SBI_EXT_BASE)) { + if ((extid >= SBI_EXT_0_1_SET_TIMER && extid <= SBI_EXT_0_1_SHUTDOWN) || + (extid == SBI_EXT_BASE) || + (extid == SBI_EXT_TIME)) { *out_val = 1; } else if (extid >= SBI_EXT_VENDOR_START && extid <= SBI_EXT_VENDOR_END) { @@ -111,9 +112,26 @@ int sbi_ecall_base_handler(struct sbi_scratch *scratch, return ret; } -int sbi_ecall_0_1_handler(struct sbi_scratch *scratch, - unsigned long extid, unsigned long *args, - struct sbi_trap_info *out_trap) +int sbi_ecall_time_handler(struct sbi_scratch *scratch, unsigned long funcid, + unsigned long *args) +{ + int ret = 0; + + if (funcid == SBI_EXT_TIME_SET_TIMER) { +#if __riscv_xlen == 32 + sbi_timer_event_start(scratch, + (((u64)args[1] << 32) | (u64)args[0])); +#else + sbi_timer_event_start(scratch, (u64)args[0]); +#endif + } else + ret = SBI_ENOTSUPP; + + return ret; +} + +int sbi_ecall_0_1_handler(struct sbi_scratch *scratch, unsigned long extid, + unsigned long *args, struct sbi_trap_info *out_trap) { int ret = 0; struct sbi_tlb_info tlb_info; @@ -205,6 +223,8 @@ int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs, } else if (extension_id == SBI_EXT_BASE) ret = sbi_ecall_base_handler(scratch, extension_id, func_id, args, &out_val, &trap); + else if (extension_id == SBI_EXT_TIME) + ret = sbi_ecall_time_handler(scratch, func_id, args); else if (extension_id >= SBI_EXT_VENDOR_START && extension_id <= SBI_EXT_VENDOR_END) { ret = sbi_ecall_vendor_ext_handler(scratch, extension_id, |