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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include <sbi/riscv_asm.h>
#include <sbi/riscv_atomic.h>
#include <sbi/sbi_console.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_hartmask.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_tlb.h>
#include <sbi/sbi_version.h>
#define BANNER \
" ____ _____ ____ _____\n" \
" / __ \\ / ____| _ \\_ _|\n" \
" | | | |_ __ ___ _ __ | (___ | |_) || |\n" \
" | | | | '_ \\ / _ \\ '_ \\ \\___ \\| _ < | |\n" \
" | |__| | |_) | __/ | | |____) | |_) || |_\n" \
" \\____/| .__/ \\___|_| |_|_____/|____/_____|\n" \
" | |\n" \
" |_|\n\n"
static void sbi_boot_prints(struct sbi_scratch *scratch, u32 hartid)
{
int xlen;
char str[64];
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
#ifdef OPENSBI_VERSION_GIT
sbi_printf("\nOpenSBI %s\n", OPENSBI_VERSION_GIT);
#else
sbi_printf("\nOpenSBI v%d.%d\n", OPENSBI_VERSION_MAJOR,
OPENSBI_VERSION_MINOR);
#endif
sbi_printf(BANNER);
/* Determine MISA XLEN and MISA string */
xlen = misa_xlen();
if (xlen < 1) {
sbi_printf("Error %d getting MISA XLEN\n", xlen);
sbi_hart_hang();
}
xlen = 16 * (1 << xlen);
misa_string(str, sizeof(str));
/* Platform details */
sbi_printf("Platform Name : %s\n", sbi_platform_name(plat));
sbi_printf("Platform HART Features : RV%d%s\n", xlen, str);
sbi_printf("Platform Max HARTs : %d\n",
sbi_platform_hart_count(plat));
sbi_printf("Current Hart : %u\n", hartid);
/* Firmware details */
sbi_printf("Firmware Base : 0x%lx\n", scratch->fw_start);
sbi_printf("Firmware Size : %d KB\n",
(u32)(scratch->fw_size / 1024));
/* Generic details */
sbi_printf("Runtime SBI Version : %d.%d\n",
sbi_ecall_version_major(), sbi_ecall_version_minor());
sbi_printf("\n");
sbi_hart_delegation_dump(scratch);
sbi_hart_pmp_dump(scratch);
}
static unsigned long init_count_offset;
static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
{
int rc;
unsigned long *init_count;
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
init_count_offset = sbi_scratch_alloc_offset(__SIZEOF_POINTER__,
"INIT_COUNT");
if (!init_count_offset)
sbi_hart_hang();
rc = sbi_hsm_init(scratch, hartid, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_system_early_init(scratch, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_hart_init(scratch, hartid, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_console_init(scratch);
if (rc)
sbi_hart_hang();
rc = sbi_platform_irqchip_init(plat, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_ipi_init(scratch, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_tlb_init(scratch, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_timer_init(scratch, TRUE);
if (rc)
sbi_hart_hang();
rc = sbi_ecall_init();
if (rc)
sbi_hart_hang();
rc = sbi_system_final_init(scratch, TRUE);
if (rc)
sbi_hart_hang();
if (!(scratch->options & SBI_SCRATCH_NO_BOOT_PRINTS))
sbi_boot_prints(scratch, hartid);
sbi_hart_wake_coldboot_harts(scratch, hartid);
sbi_hart_mark_available(hartid);
init_count = sbi_scratch_offset_ptr(scratch, init_count_offset);
(*init_count)++;
sbi_hsm_prepare_next_jump(scratch, hartid);
sbi_hart_switch_mode(hartid, scratch->next_arg1, scratch->next_addr,
scratch->next_mode, FALSE);
}
static void __noreturn init_warmboot(struct sbi_scratch *scratch, u32 hartid)
{
int rc;
unsigned long *init_count;
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
sbi_hart_wait_for_coldboot(scratch, hartid);
if (!init_count_offset)
sbi_hart_hang();
rc = sbi_hsm_init(scratch, hartid, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_system_early_init(scratch, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_hart_init(scratch, hartid, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_platform_irqchip_init(plat, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_ipi_init(scratch, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_tlb_init(scratch, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_timer_init(scratch, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_system_final_init(scratch, FALSE);
if (rc)
sbi_hart_hang();
sbi_hart_mark_available(hartid);
init_count = sbi_scratch_offset_ptr(scratch, init_count_offset);
(*init_count)++;
sbi_hsm_prepare_next_jump(scratch, hartid);
sbi_hart_switch_mode(hartid, scratch->next_arg1,
scratch->next_addr,
scratch->next_mode, FALSE);
}
static atomic_t coldboot_lottery = ATOMIC_INITIALIZER(0);
/**
* Initialize OpenSBI library for current HART and jump to next
* booting stage.
*
* The function expects following:
* 1. The 'mscratch' CSR is pointing to sbi_scratch of current HART
* 2. Stack pointer (SP) is setup for current HART
* 3. Interrupts are disabled in MSTATUS CSR
* 4. All interrupts are disabled in MIE CSR
*
* @param scratch pointer to sbi_scratch of current HART
*/
void __noreturn sbi_init(struct sbi_scratch *scratch)
{
bool coldboot = FALSE;
u32 hartid = sbi_current_hartid();
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
if ((SBI_HARTMASK_MAX_BITS <= hartid) ||
sbi_platform_hart_disabled(plat, hartid))
sbi_hart_hang();
if (atomic_add_return(&coldboot_lottery, 1) == 1)
coldboot = TRUE;
if (coldboot)
init_coldboot(scratch, hartid);
else
init_warmboot(scratch, hartid);
}
unsigned long sbi_init_count(u32 hartid)
{
struct sbi_scratch *scratch;
unsigned long *init_count;
if (sbi_platform_hart_count(sbi_platform_thishart_ptr()) <= hartid ||
!init_count_offset)
return 0;
scratch = sbi_hart_id_to_scratch(sbi_scratch_thishart_ptr(), hartid);
init_count = sbi_scratch_offset_ptr(scratch, init_count_offset);
return *init_count;
}
/**
* Exit OpenSBI library for current HART and stop HART
*
* The function expects following:
* 1. The 'mscratch' CSR is pointing to sbi_scratch of current HART
* 2. Stack pointer (SP) is setup for current HART
*
* @param scratch pointer to sbi_scratch of current HART
*/
void __noreturn sbi_exit(struct sbi_scratch *scratch)
{
u32 hartid = sbi_current_hartid();
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
if (sbi_platform_hart_disabled(plat, hartid))
sbi_hart_hang();
sbi_hart_unmark_available(hartid);
sbi_platform_early_exit(plat);
sbi_timer_exit(scratch);
sbi_ipi_exit(scratch);
sbi_platform_irqchip_exit(plat);
sbi_platform_final_exit(plat);
sbi_hsm_exit(scratch);
}
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