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OpenSBI

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Lee Lup Yuen 2023-10-20 18:57:07 +08:00
parent 8c76ee9309
commit 9c3dbcf461
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@ -8180,6 +8180,7 @@ TODO
From https://github.com/lupyuen2/wip-pinephone-nuttx/blob/sbi/boards/risc-v/jh7110/star64/src/jh7110_appinit.c#L155-L237
```c
// After NuttX boots on JH7110...
void board_late_initialize(void) {
...
// Make an ecall to OpenSBI
@ -8200,6 +8201,51 @@ int test_opensbi(void) {
sbi_ecall(SBI_EXT_0_1_CONSOLE_PUTCHAR, 0, '3', 0, 0, 0, 0, 0);
```
From https://github.com/lupyuen2/wip-pinephone-nuttx/blob/sbi/boards/risc-v/jh7110/star64/src/jh7110_appinit.c#L268-L299
```c
// Make an ecall to OpenSBI. Based on
// https://github.com/apache/nuttx/blob/master/arch/risc-v/src/common/supervisor/riscv_sbi.c#L52-L77
// https://github.com/riscv-software-src/opensbi/blob/master/firmware/payloads/test_main.c
static struct sbiret sbi_ecall(unsigned int extid, unsigned int fid,
uintptr_t parm0, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5)
{
struct sbiret ret;
register long r0 asm("a0") = (long)(parm0);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
register long r6 asm("a6") = (long)(fid);
register long r7 asm("a7") = (long)(extid);
asm volatile
(
"ecall"
: "+r"(r0), "+r"(r1)
: "r"(r2), "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7)
: "memory"
);
ret.error = r0;
ret.value = r1;
return ret;
}
```
From https://github.com/lupyuen2/wip-pinephone-nuttx/blob/sbi/boards/risc-v/jh7110/star64/src/jh7110_appinit.c#L300-L310
```text
Starting kernel ...
BC123test_opensbi: sret.value=0, sret.error=-2
test_opensbi: sret.value=0, sret.error=-2
NuttShell (NSH) NuttX-12.0.3
nsh>
```
From https://github.com/lupyuen2/wip-pinephone-nuttx/blob/sbi/boards/risc-v/jh7110/star64/src/jh7110_appinit.c#L237-L265
```c