mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
ca7e93fa9f
Provide library functions to read: * machine vendor ID * machine architecture ID * machine implementation ID Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Sean Anderson <seanga2@gmail.com>
316 lines
6.9 KiB
C
316 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* SBI initialilization and all extension implementation.
|
|
*
|
|
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
|
|
*
|
|
* Taken from Linux arch/riscv/kernel/sbi.c
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/encoding.h>
|
|
#include <asm/sbi.h>
|
|
|
|
struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
|
|
unsigned long arg1, unsigned long arg2,
|
|
unsigned long arg3, unsigned long arg4,
|
|
unsigned long arg5)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0);
|
|
register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1);
|
|
register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2);
|
|
register uintptr_t a3 asm ("a3") = (uintptr_t)(arg3);
|
|
register uintptr_t a4 asm ("a4") = (uintptr_t)(arg4);
|
|
register uintptr_t a5 asm ("a5") = (uintptr_t)(arg5);
|
|
register uintptr_t a6 asm ("a6") = (uintptr_t)(fid);
|
|
register uintptr_t a7 asm ("a7") = (uintptr_t)(ext);
|
|
asm volatile ("ecall"
|
|
: "+r" (a0), "+r" (a1)
|
|
: "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r" (a6), "r" (a7)
|
|
: "memory");
|
|
ret.error = a0;
|
|
ret.value = a1;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* sbi_set_timer() - Program the timer for next timer event.
|
|
* @stime_value: The value after which next timer event should fire.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_set_timer(uint64_t stime_value)
|
|
{
|
|
#if __riscv_xlen == 32
|
|
sbi_ecall(SBI_EXT_SET_TIMER, SBI_FID_SET_TIMER, stime_value,
|
|
stime_value >> 32, 0, 0, 0, 0);
|
|
#else
|
|
sbi_ecall(SBI_EXT_SET_TIMER, SBI_FID_SET_TIMER, stime_value,
|
|
0, 0, 0, 0, 0);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* sbi_get_spec_version() - get current SBI specification version
|
|
*
|
|
* Return: version id
|
|
*/
|
|
long sbi_get_spec_version(void)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_SPEC_VERSION,
|
|
0, 0, 0, 0, 0, 0);
|
|
if (!ret.error)
|
|
if (ret.value)
|
|
return ret.value;
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/**
|
|
* sbi_get_impl_id() - get SBI implementation ID
|
|
*
|
|
* Return: implementation ID
|
|
*/
|
|
int sbi_get_impl_id(void)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_ID,
|
|
0, 0, 0, 0, 0, 0);
|
|
if (!ret.error)
|
|
if (ret.value)
|
|
return ret.value;
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/**
|
|
* sbi_get_impl_version() - get SBI implementation version
|
|
*
|
|
* @version: pointer to receive version
|
|
* Return: 0 on success, -ENOTSUPP otherwise
|
|
*/
|
|
int sbi_get_impl_version(long *version)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_VERSION,
|
|
0, 0, 0, 0, 0, 0);
|
|
if (ret.error)
|
|
return -ENOTSUPP;
|
|
if (version)
|
|
*version = ret.value;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sbi_probe_extension() - Check if an SBI extension ID is supported or not.
|
|
* @extid: The extension ID to be probed.
|
|
*
|
|
* Return: Extension specific nonzero value f yes, -ENOTSUPP otherwise.
|
|
*/
|
|
int sbi_probe_extension(int extid)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_PROBE_EXT, extid,
|
|
0, 0, 0, 0, 0);
|
|
if (!ret.error)
|
|
if (ret.value)
|
|
return ret.value;
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/**
|
|
* sbi_get_mvendorid() - get machine vendor ID
|
|
*
|
|
* @mimpid: on return machine vendor ID
|
|
* Return: 0 on success
|
|
*/
|
|
int sbi_get_mvendorid(long *mvendorid)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MVENDORID,
|
|
0, 0, 0, 0, 0, 0);
|
|
if (ret.error)
|
|
return -ENOTSUPP;
|
|
|
|
if (mvendorid)
|
|
*mvendorid = ret.value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sbi_get_marchid() - get machine architecture ID
|
|
*
|
|
* @mimpid: on return machine architecture ID
|
|
* Return: 0 on success
|
|
*/
|
|
int sbi_get_marchid(long *marchid)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MARCHID,
|
|
0, 0, 0, 0, 0, 0);
|
|
|
|
if (ret.error)
|
|
return -ENOTSUPP;
|
|
|
|
if (marchid)
|
|
*marchid = ret.value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sbi_get_mimpid() - get machine implementation ID
|
|
*
|
|
* @mimpid: on return machine implementation ID
|
|
* Return: 0 on success
|
|
*/
|
|
int sbi_get_mimpid(long *mimpid)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MIMPID,
|
|
0, 0, 0, 0, 0, 0);
|
|
|
|
if (ret.error)
|
|
return -ENOTSUPP;
|
|
|
|
if (mimpid)
|
|
*mimpid = ret.value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sbi_srst_reset() - invoke system reset extension
|
|
*
|
|
* @type: type of reset
|
|
* @reason: reason for reset
|
|
*/
|
|
void sbi_srst_reset(unsigned long type, unsigned long reason)
|
|
{
|
|
sbi_ecall(SBI_EXT_SRST, SBI_EXT_SRST_RESET, type, reason,
|
|
0, 0, 0, 0);
|
|
}
|
|
|
|
#ifdef CONFIG_SBI_V01
|
|
|
|
/**
|
|
* sbi_console_putchar() - Writes given character to the console device.
|
|
* @ch: The data to be written to the console.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_console_putchar(int ch)
|
|
{
|
|
sbi_ecall(SBI_EXT_0_1_CONSOLE_PUTCHAR, 0, ch, 0, 0, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* sbi_console_getchar() - Reads a byte from console device.
|
|
*
|
|
* Returns the value read from console.
|
|
*/
|
|
int sbi_console_getchar(void)
|
|
{
|
|
struct sbiret ret;
|
|
|
|
ret = sbi_ecall(SBI_EXT_0_1_CONSOLE_GETCHAR, 0, 0, 0, 0, 0, 0, 0);
|
|
|
|
return ret.error;
|
|
}
|
|
|
|
/**
|
|
* sbi_clear_ipi() - Clear any pending IPIs for the calling hart.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_clear_ipi(void)
|
|
{
|
|
sbi_ecall(SBI_EXT_0_1_CLEAR_IPI, 0, 0, 0, 0, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* sbi_shutdown() - Remove all the harts from executing supervisor code.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_shutdown(void)
|
|
{
|
|
sbi_ecall(SBI_EXT_0_1_SHUTDOWN, 0, 0, 0, 0, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* sbi_send_ipi() - Send an IPI to any hart.
|
|
* @hart_mask: A cpu mask containing all the target harts.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_send_ipi(const unsigned long *hart_mask)
|
|
{
|
|
sbi_ecall(SBI_EXT_SEND_IPI, SBI_FID_SEND_IPI, (unsigned long)hart_mask,
|
|
0, 0, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* sbi_remote_fence_i() - Execute FENCE.I instruction on given remote harts.
|
|
* @hart_mask: A cpu mask containing all the target harts.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_remote_fence_i(const unsigned long *hart_mask)
|
|
{
|
|
sbi_ecall(SBI_EXT_REMOTE_FENCE_I, SBI_FID_REMOTE_FENCE_I,
|
|
(unsigned long)hart_mask, 0, 0, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* sbi_remote_sfence_vma() - Execute SFENCE.VMA instructions on given remote
|
|
* harts for the specified virtual address range.
|
|
* @hart_mask: A cpu mask containing all the target harts.
|
|
* @start: Start of the virtual address
|
|
* @size: Total size of the virtual address range.
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_remote_sfence_vma(const unsigned long *hart_mask,
|
|
unsigned long start,
|
|
unsigned long size)
|
|
{
|
|
sbi_ecall(SBI_EXT_REMOTE_SFENCE_VMA, SBI_FID_REMOTE_SFENCE_VMA,
|
|
(unsigned long)hart_mask, start, size, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* sbi_remote_sfence_vma_asid() - Execute SFENCE.VMA instructions on given
|
|
* remote harts for a virtual address range belonging to a specific ASID.
|
|
*
|
|
* @hart_mask: A cpu mask containing all the target harts.
|
|
* @start: Start of the virtual address
|
|
* @size: Total size of the virtual address range.
|
|
* @asid: The value of address space identifier (ASID).
|
|
*
|
|
* Return: None
|
|
*/
|
|
void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
|
|
unsigned long start,
|
|
unsigned long size,
|
|
unsigned long asid)
|
|
{
|
|
sbi_ecall(SBI_EXT_REMOTE_SFENCE_VMA_ASID,
|
|
SBI_FID_REMOTE_SFENCE_VMA_ASID,
|
|
(unsigned long)hart_mask, start, size, asid, 0, 0);
|
|
}
|
|
|
|
#endif /* CONFIG_SBI_V01 */
|