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author | Anup Patel <anup.patel@wdc.com> | 2020-01-17 15:39:49 +0300 |
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committer | Anup Patel <anup@brainfault.org> | 2020-01-22 09:43:40 +0300 |
commit | 766850222af4c39a52acf1fb12a97f2a42747d32 (patch) | |
tree | b8f2058907a2f3f74a047826f89d09835f037dfe /lib/sbi/sbi_ecall_legacy.c | |
parent | 37923c4a66180b2f7881d959cd631038e81dbfec (diff) | |
download | opensbi-766850222af4c39a52acf1fb12a97f2a42747d32.tar.xz |
lib: Factor-out SBI legacy extension
This patch factor-out SBI legacy extension into its own source
for better modularity of SBI implementation.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'lib/sbi/sbi_ecall_legacy.c')
-rw-r--r-- | lib/sbi/sbi_ecall_legacy.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/lib/sbi/sbi_ecall_legacy.c b/lib/sbi/sbi_ecall_legacy.c new file mode 100644 index 0000000..1150d7a --- /dev/null +++ b/lib/sbi/sbi_ecall_legacy.c @@ -0,0 +1,119 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2020 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel <anup.patel@wdc.com> + * Atish Patra <atish.patra@wdc.com> + */ + +#include <sbi/sbi_console.h> +#include <sbi/sbi_ecall.h> +#include <sbi/sbi_ecall_interface.h> +#include <sbi/sbi_error.h> +#include <sbi/sbi_ipi.h> +#include <sbi/sbi_system.h> +#include <sbi/sbi_timer.h> +#include <sbi/sbi_tlb.h> +#include <sbi/sbi_trap.h> +#include <sbi/sbi_unpriv.h> +#include <sbi/sbi_hart.h> + +static int sbi_load_hart_mask_unpriv(struct sbi_scratch *scratch, + ulong *pmask, ulong *hmask, + struct sbi_trap_info *uptrap) +{ + ulong mask = 0; + + if (pmask) { + mask = sbi_load_ulong(pmask, scratch, uptrap); + if (uptrap->cause) + return SBI_ETRAP; + } else { + mask = sbi_hart_available_mask(); + } + *hmask = mask; + return 0; +} + +static int sbi_ecall_legacy_handler(struct sbi_scratch *scratch, + unsigned long extid, unsigned long funcid, + unsigned long *args, unsigned long *out_val, + struct sbi_trap_info *out_trap) +{ + int ret = 0; + struct sbi_tlb_info tlb_info; + u32 source_hart = sbi_current_hartid(); + ulong hmask = 0; + + switch (extid) { + case SBI_EXT_0_1_SET_TIMER: +#if __riscv_xlen == 32 + sbi_timer_event_start(scratch, + (((u64)args[1] << 32) | (u64)args[0])); +#else + sbi_timer_event_start(scratch, (u64)args[0]); +#endif + break; + case SBI_EXT_0_1_CONSOLE_PUTCHAR: + sbi_putc(args[0]); + break; + case SBI_EXT_0_1_CONSOLE_GETCHAR: + ret = sbi_getc(); + break; + case SBI_EXT_0_1_CLEAR_IPI: + sbi_ipi_clear_smode(scratch); + break; + case SBI_EXT_0_1_SEND_IPI: + ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0], + &hmask, out_trap); + if (ret != SBI_ETRAP) + ret = sbi_ipi_send_smode(scratch, hmask, 0); + break; + case SBI_EXT_0_1_REMOTE_FENCE_I: + tlb_info.start = 0; + tlb_info.size = 0; + tlb_info.type = SBI_ITLB_FLUSH; + tlb_info.shart_mask = 1UL << source_hart; + ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0], + &hmask, out_trap); + if (ret != SBI_ETRAP) + ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info); + break; + case SBI_EXT_0_1_REMOTE_SFENCE_VMA: + tlb_info.start = (unsigned long)args[1]; + tlb_info.size = (unsigned long)args[2]; + tlb_info.type = SBI_TLB_FLUSH_VMA; + tlb_info.shart_mask = 1UL << source_hart; + ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0], + &hmask, out_trap); + if (ret != SBI_ETRAP) + ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info); + break; + case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID: + tlb_info.start = (unsigned long)args[1]; + tlb_info.size = (unsigned long)args[2]; + tlb_info.asid = (unsigned long)args[3]; + tlb_info.type = SBI_TLB_FLUSH_VMA_ASID; + tlb_info.shart_mask = 1UL << source_hart; + ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0], + &hmask, out_trap); + if (ret != SBI_ETRAP) + ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info); + break; + case SBI_EXT_0_1_SHUTDOWN: + sbi_system_shutdown(scratch, 0); + break; + default: + ret = SBI_ENOTSUPP; + }; + + return ret; +} + +struct sbi_ecall_extension ecall_legacy = { + .extid_start = SBI_EXT_0_1_SET_TIMER, + .extid_end = SBI_EXT_0_1_SHUTDOWN, + .handle = sbi_ecall_legacy_handler, +}; |