Imbus/xv6-riscv-kernel
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comments for timer setup

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This commit is contained in:
Robert Morris 2019-07-25 05:35:03 -04:00
parent aef3e0f5a4
commit 5d5e4e065f
4 changed files with 23 additions and 8 deletions
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8
kernel/riscv.h
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@ -9,11 +9,11 @@ r_mhartid()
// Machine Status Register, mstatus
#define MSTATUS_MPP_MASK (3L << 11)
#define MSTATUS_MPP_MASK (3L << 11) // previous mode.
#define MSTATUS_MPP_M (3L << 11)
#define MSTATUS_MPP_S (1L << 11)
#define MSTATUS_MPP_U (0L << 11)
#define MSTATUS_MIE (1L << 3)
#define MSTATUS_MIE (1L << 3) // machine-mode interrupt enable.
static inline uint64
r_mstatus()
@ -95,8 +95,8 @@ w_sie(uint64 x)
// Machine-mode Interrupt Enable
#define MIE_MEIE (1L << 11) // external
#define MIE_MTIE (1L << 7) // timer
#define MIE_MSIE (1L << 3) // software
#define MIE_MTIE (1L << 7) // timer
#define MIE_MSIE (1L << 3) // software
static inline uint64
r_mie()
{