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reduce one instruction when switch to irq stack

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This commit is contained in:
acevest
2019-10-06 23:32:09 +08:00
parent 93ae1c96ca
commit ae3ada8dfe
4 changed files with 29 additions and 27 deletions
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20
arch/risc-v/bumblebee/gcc/riscv_port.h
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@@ -25,16 +25,16 @@
#define CLINT_MTIME 0x0000
// the bumblebee mstatus register is different
// name bit detail
// INTERRUPT 31 0: exception or nmi, 1 irq
// MINHV 30 reading irq vector table
// MPP 29:28 == mstatus.MPP
// MPIE 27 == mstatus.MPIE
// Reserved 26:24 0
// MPIL 23:16 previous interrupt level
// Reserved 15:12 0
// EXCCODE 11:0 exception code
#define SOC_MCAUSE_EXP_MASK 0x00000FFF
// name bit detail
// INTERRUPT 31 0: exception or nmi, 1 irq
// MINHV 30 reading irq vector table
// MPP 29:28 == mstatus.MPP
// MPIE 27 == mstatus.MPIE
// Reserved 26:24 0
// MPIL 23:16 previous interrupt level
// Reserved 15:12 0
// EXCCODE 11:0 exception code
#define MCAUSE_EXP_CODE_MASK 0x00000FFF
#ifndef __ASSEMBLER__
void port_cpu_init();