Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: Emulate HTIMEDELTA CSR for platforms not having TIME CSR

Browse Source 
For platforms not having TIME CSR, we trap-n-emulate TIME CSR
read/write in OpenSBI. Same rationale applies to HTIMEDELTA CSR
as well so we trap-n-emulate HTIMEDELTA CSR for platforms not
having TIME CSR.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel
2019-08-18 13:14:44 +05:30
committed by Anup Patel
parent 7d4420bd69
commit 1e9f88889f
6 changed files with 124 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
lib/sbi/sbi_illegal_insn.c
View File

@@ -49,8 +49,7 @@ static int system_opcode_insn(ulong insn, u32 hartid, ulong mcause,
return sbi_trap_redirect(regs, scratch,
regs->mepc, mcause, insn);
if (sbi_emulate_csr_read(csr_num, hartid, regs->mstatus,
scratch, &csr_val))
if (sbi_emulate_csr_read(csr_num, hartid, regs, scratch, &csr_val))
return truly_illegal_insn(insn, hartid, mcause,
regs, scratch);
@@ -80,7 +79,7 @@ static int system_opcode_insn(ulong insn, u32 hartid, ulong mcause,
return truly_illegal_insn(insn, hartid, mcause, regs, scratch);
};
if (do_write && sbi_emulate_csr_write(csr_num, hartid, regs->mstatus,
if (do_write && sbi_emulate_csr_write(csr_num, hartid, regs,
scratch, new_csr_val))
return truly_illegal_insn(insn, hartid, mcause, regs, scratch);