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OpenSBI

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Lee Lup Yuen 2023-10-20 18:54:13 +08:00
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@ -8173,6 +8173,65 @@ Not AXP15060 PMIC, which has I2C Address 0x36 [(Page 7)](https://files.pine64.or
TODO: Check the U-Boot Device Tree
# Call OpenSBI from NuttX
TODO
From https://github.com/lupyuen2/wip-pinephone-nuttx/blob/sbi/boards/risc-v/jh7110/star64/src/jh7110_appinit.c#L155-L237
```c
void board_late_initialize(void) {
...
// Make an ecall to OpenSBI
int test_opensbi(void);
int ret = test_opensbi();
DEBUGASSERT(ret == OK);
}
// Make an ecall to OpenSBI. Based on
// https://github.com/riscv-software-src/opensbi/blob/master/firmware/payloads/test_main.c
// https://www.thegoodpenguin.co.uk/blog/an-overview-of-opensbi/
int test_opensbi(void) {
// Print `123` to Debug Console with Legacy Console Putchar.
// Call sbi_console_putchar: EID 0x01, FID 0
// https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-legacy.adoc
sbi_ecall(SBI_EXT_0_1_CONSOLE_PUTCHAR, 0, '1', 0, 0, 0, 0, 0);
sbi_ecall(SBI_EXT_0_1_CONSOLE_PUTCHAR, 0, '2', 0, 0, 0, 0, 0);
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#L237-L265
```c
// TODO: Not supported by SBI v0.2, this will return SBI_ERR_NOT_SUPPORTED
// Print `456` to Debug Console.
// Call sbi_debug_console_write: EID 0x4442434E, FID 0
// https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-debug-console.adoc#function-console-write-fid-0
const char *str = "456";
struct sbiret sret = sbi_ecall(
SBI_EXT_DBCN, // Extension ID
SBI_EXT_DBCN_CONSOLE_WRITE, // Function ID
strlen(str), // Number of bytes
(unsigned long)str, // Address Low
0, // Address High
0, 0, 0 // Unused
);
_info("sret.value=%d, sret.error=%d\n", sret.value, sret.error);
// DEBUGASSERT(sret.error == SBI_SUCCESS);
// DEBUGASSERT(sret.value == strlen(str));
// TODO: Not supported by SBI v0.2, this will return SBI_ERR_NOT_SUPPORTED
// Print `789` to Debug Console.
// Call sbi_debug_console_write_byte: EID 0x4442434E, FID 2
// https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-debug-console.adoc#function-console-write-byte-fid-2
sret = sbi_ecall(SBI_EXT_DBCN, SBI_EXT_DBCN_CONSOLE_WRITE_BYTE, '7', 0, 0, 0, 0, 0);
sret = sbi_ecall(SBI_EXT_DBCN, SBI_EXT_DBCN_CONSOLE_WRITE_BYTE, '8', 0, 0, 0, 0, 0);
sret = sbi_ecall(SBI_EXT_DBCN, SBI_EXT_DBCN_CONSOLE_WRITE_BYTE, '9', 0, 0, 0, 0, 0);
_info("sret.value=%d, sret.error=%d\n", sret.value, sret.error);
// DEBUGASSERT(sret.error == SBI_SUCCESS);
// DEBUGASSERT(sret.value == strlen(str));
```
# PineTab-V Factory Test Code
The PineTab-V ships with [Factory Test Code](https://wiki.pine64.org/wiki/PineTab-V_Releases#Factory_releases).