diff options
| author | Atish Patra <atish.patra@wdc.com> | 2019-10-02 23:59:40 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-10-03 06:28:51 +0300 |
| commit | 30f09fbfd1ec0269dafb1dbb3c9c07f1b5c0ec81 (patch) | |
| tree | ea82ab5c139daa80073463607af16aff40442fe0 /lib/sbi | |
| parent | 0790be0f2c932f66ab0717661f9adb919c1b01e8 (diff) | |
| download | opensbi-30f09fbfd1ec0269dafb1dbb3c9c07f1b5c0ec81.tar.xz | |
lib: Provide a platform hook to implement vendor specific SBI extensions.
SBI v0.2 specification allows vendor extensions and it should be
implemented in a independent of the core sbi library.
Introduce a single platform callback that will let platforms handle
all vendor extensions in platform specific code if they want.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib/sbi')
| -rw-r--r-- | lib/sbi/sbi_ecall.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/lib/sbi/sbi_ecall.c b/lib/sbi/sbi_ecall.c index 0a934e9..5864590 100644 --- a/lib/sbi/sbi_ecall.c +++ b/lib/sbi/sbi_ecall.c @@ -12,6 +12,7 @@ #include <sbi/sbi_ecall_interface.h> #include <sbi/sbi_error.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> @@ -47,14 +48,30 @@ int sbi_check_extension(struct sbi_scratch *scratch, unsigned long extid, */ if ((extid >= SBI_EXT_0_1_SET_TIMER && - extid <= SBI_EXT_0_1_SHUTDOWN) || (extid == SBI_EXT_BASE)) + extid <= SBI_EXT_0_1_SHUTDOWN) || (extid == SBI_EXT_BASE)) { *out_val = 1; - else + } else if (extid >= SBI_EXT_VENDOR_START && + extid <= SBI_EXT_VENDOR_END) { + *out_val = sbi_platform_vendor_ext_check( + sbi_platform_ptr(scratch), + extid); + } else *out_val = 0; return 0; } +int sbi_ecall_vendor_ext_handler(struct sbi_scratch *scratch, + unsigned long extid, unsigned long funcid, + unsigned long *args, unsigned long *out_val, + unsigned long *out_tcause, + unsigned long *out_tval) +{ + return sbi_platform_vendor_ext_provider(sbi_platform_ptr(scratch), + extid, funcid, args, out_val, + out_tcause, out_tval); +} + int sbi_ecall_base_handler(struct sbi_scratch *scratch, unsigned long extid, unsigned long funcid, unsigned long *args, unsigned long *out_val, unsigned long *out_tcause, @@ -195,8 +212,14 @@ int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs, ret = sbi_ecall_base_handler(scratch, extension_id, func_id, args, &out_val, &out_tval, &out_tcause); - else + else if (extension_id >= SBI_EXT_VENDOR_START && + extension_id <= SBI_EXT_VENDOR_END) { + ret = sbi_ecall_vendor_ext_handler(scratch, extension_id, + func_id, args, &out_val, + &out_tval, &out_tcause); + } else { ret = SBI_ENOTSUPP; + } if (ret == SBI_ETRAP) { sbi_trap_redirect(regs, scratch, regs->mepc, |