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lib: sbi: sse: Add support for SSTATUS.SDT

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Similarly to what is done for SPELP, handle SSTATUS.SDT upon event
injection. In order to mimick an interrupt, set SDT to 1 for injection and
save its previous value in interrupted_flags[5:5]. Restore it upon
completion.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
This commit is contained in:
Clément Léger
2025-03-25 11:26:14 +01:00
committed by Anup Patel
parent b4464b22e4
commit 3ac49712e3
3 changed files with 13 additions and 3 deletions
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3
include/sbi/riscv_encoding.h
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@@ -32,7 +32,8 @@
#define MSTATUS_TVM _UL(0x00100000)
#define MSTATUS_TW _UL(0x00200000)
#define MSTATUS_TSR _UL(0x00400000)
#define MSTATUS_SPELP _UL(0x00800000)
#define MSTATUS_SPELP _UL(0x00800000)
#define MSTATUS_SDT _UL(0x01000000)
#define MSTATUS32_SD _UL(0x80000000)
#if __riscv_xlen == 64
#define MSTATUS_UXL _ULL(0x0000000300000000)

1
include/sbi/sbi_ecall_interface.h
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@@ -385,6 +385,7 @@ enum sbi_sse_attr_id {
#define SBI_SSE_ATTR_INTERRUPTED_FLAGS_HSTATUS_SPV BIT(2)
#define SBI_SSE_ATTR_INTERRUPTED_FLAGS_HSTATUS_SPVP BIT(3)
#define SBI_SSE_ATTR_INTERRUPTED_FLAGS_SSTATUS_SPELP BIT(4)
#define SBI_SSE_ATTR_INTERRUPTED_FLAGS_SSTATUS_SDT BIT(5)
enum sbi_sse_state {
SBI_SSE_STATE_UNUSED = 0,