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RISC-V: Add interrupt related SCAUSE defines in asm/csr.h

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This patch adds SCAUSE interrupt flag and SCAUSE interrupt related
defines to asm/csr.h. We also use these defines in kernel/irq.c and
express SIE/SIP flags in-terms of SCAUSE interrupt causes.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Anup Patel
2019-04-25 08:38:37 +00:00
committed by Palmer Dabbelt
parent 196a14d451
commit 6dcaf00487
2 changed files with 21 additions and 16 deletions
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21
arch/riscv/include/asm/csr.h
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@@ -51,10 +51,18 @@
#define SATP_MODE SATP_MODE_39
#endif
/* Interrupt Enable and Interrupt Pending flags */
#define SIE_SSIE _AC(0x00000002, UL) /* Software Interrupt Enable */
#define SIE_STIE _AC(0x00000020, UL) /* Timer Interrupt Enable */
#define SIE_SEIE _AC(0x00000200, UL) /* External Interrupt Enable */
/* SCAUSE */
#define SCAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1))
#define IRQ_U_SOFT 0
#define IRQ_S_SOFT 1
#define IRQ_M_SOFT 3
#define IRQ_U_TIMER 4
#define IRQ_S_TIMER 5
#define IRQ_M_TIMER 7
#define IRQ_U_EXT 8
#define IRQ_S_EXT 9
#define IRQ_M_EXT 11
#define EXC_INST_MISALIGNED 0
#define EXC_INST_ACCESS 1
@@ -66,6 +74,11 @@
#define EXC_LOAD_PAGE_FAULT 13
#define EXC_STORE_PAGE_FAULT 15
/* SIE (Interrupt Enable) and SIP (Interrupt Pending) flags */
#define SIE_SSIE (_AC(0x1, UL) << IRQ_S_SOFT)
#define SIE_STIE (_AC(0x1, UL) << IRQ_S_TIMER)
#define SIE_SEIE (_AC(0x1, UL) << IRQ_S_EXT)
#ifndef __ASSEMBLY__
#define csr_swap(csr, val) \