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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>
This commit is contained in:
Atish Patra 2019-11-24 23:33:46 -08:00 committed by Anup Patel
parent aa0ed1d733
commit 109266397a
1 changed files with 25 additions and 5 deletions
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30
lib/sbi/sbi_ecall.c
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@ -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,