d4cb5e934f
-2da720, Add rst/unrst/reset c906l ecall. Change-Id: Id1b2de0c5cb4607d46fd4397a78e77109790cc49
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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* Atish Patra <atish.patra@wdc.com>
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*/
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#include <sbi/sbi_ecall.h>
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#include <sbi/sbi_ecall_interface.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_trap.h>
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#include <sbi/sbi_version.h>
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#include <sbi/riscv_asm.h>
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#include <sbi/riscv_io.h>
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static int sbi_ecall_base_probe(unsigned long extid, unsigned long *out_val)
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{
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struct sbi_ecall_extension *ext;
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ext = sbi_ecall_find_extension(extid);
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if (!ext) {
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*out_val = 0;
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return 0;
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}
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if (ext->probe)
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return ext->probe(extid, out_val);
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*out_val = 1;
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return 0;
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}
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#define SEC_SYS_BASE (0x020B0000)
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static int sbi_ecall_base_rst_c906l(void)
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{
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unsigned int value;
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value = readl((void *)0x3003024);
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writel((value & (~(1 << 6))), (void *)0x3003024);
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return 0;
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}
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static int sbi_ecall_base_unrst_c906l(const unsigned long address)
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{
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unsigned int value;
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value = readl((void *)SEC_SYS_BASE + 0x04);
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writel((value | (1 << 13)), (void *)SEC_SYS_BASE + 0x04);
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writel(address, (void *)SEC_SYS_BASE + 0x20);
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writel((address >> 32), (void *)SEC_SYS_BASE + 0x24);
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value = readl((void *)0x3003024);
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writel((value | (1 << 6)), (void *)0x3003024);
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return 0;
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}
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static int sbi_ecall_base_reset_c906l(const unsigned long address)
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{
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sbi_ecall_base_rst_c906l();
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sbi_ecall_base_unrst_c906l(address);
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return 0;
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}
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static int sbi_ecall_base_handler(unsigned long extid, unsigned long funcid,
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const struct sbi_trap_regs *regs,
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unsigned long *out_val,
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struct sbi_trap_info *out_trap)
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{
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int ret = 0;
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switch (funcid) {
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case SBI_EXT_BASE_GET_SPEC_VERSION:
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*out_val = (SBI_ECALL_VERSION_MAJOR <<
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SBI_SPEC_VERSION_MAJOR_OFFSET) &
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(SBI_SPEC_VERSION_MAJOR_MASK <<
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SBI_SPEC_VERSION_MAJOR_OFFSET);
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*out_val = *out_val | SBI_ECALL_VERSION_MINOR;
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break;
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case SBI_EXT_BASE_GET_IMP_ID:
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*out_val = sbi_ecall_get_impid();
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break;
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case SBI_EXT_BASE_GET_IMP_VERSION:
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*out_val = OPENSBI_VERSION;
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break;
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case SBI_EXT_BASE_GET_MVENDORID:
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*out_val = csr_read(CSR_MVENDORID);
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break;
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case SBI_EXT_BASE_GET_MARCHID:
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*out_val = csr_read(CSR_MARCHID);
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break;
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case SBI_EXT_BASE_GET_MIMPID:
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*out_val = csr_read(CSR_MIMPID);
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break;
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case SBI_EXT_BASE_PROBE_EXT:
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ret = sbi_ecall_base_probe(regs->a0, out_val);
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break;
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case SBI_EXT_BASE_RESET_C906L:
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ret = sbi_ecall_base_reset_c906l(regs->a0);
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*out_val = regs->a0;
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break;
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case SBI_EXT_BASE_RST_C906L:
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ret = sbi_ecall_base_rst_c906l();
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break;
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case SBI_EXT_BASE_UNRST_C906L:
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ret = sbi_ecall_base_unrst_c906l(regs->a0);
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break;
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default:
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ret = SBI_ENOTSUPP;
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}
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return ret;
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}
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struct sbi_ecall_extension ecall_base = {
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.extid_start = SBI_EXT_BASE,
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.extid_end = SBI_EXT_BASE,
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.handle = sbi_ecall_base_handler,
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};
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