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Support for running with M-Mode

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This commit is contained in:
bigmagic
2021-05-21 17:03:30 +08:00
parent 0dc972bee6
commit b7c7c7f4de
26 changed files with 1162 additions and 462 deletions
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22
libcpu/risc-v/virt64/stackframe.h
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@@ -19,10 +19,10 @@
STORE x1, 1 * REGBYTES(sp)
csrr x1, sstatus
csrr x1, SRC_XSTATUS
STORE x1, 2 * REGBYTES(sp)
csrr x1, sepc
csrr x1, SRC_XEPC
STORE x1, 0 * REGBYTES(sp)
STORE x3, 3 * REGBYTES(sp)
@@ -54,17 +54,17 @@
STORE x29, 29 * REGBYTES(sp)
STORE x30, 30 * REGBYTES(sp)
STORE x31, 31 * REGBYTES(sp)
csrr t0, sscratch
csrr t0, SRC_XSCRATCH
STORE t0, 32 * REGBYTES(sp)
.endm
.macro RESTORE_ALL_ONLY
/* resw ra to sepc */
LOAD x1, 0 * REGBYTES(sp)
csrw sepc, x1
csrw SRC_XEPC, x1
LOAD x1, 2 * REGBYTES(sp)
csrw sstatus, x1
csrw SRC_XSTATUS, x1
LOAD x1, 1 * REGBYTES(sp)
@@ -104,10 +104,10 @@
.macro RESTORE_ALL
/* resw ra to sepc */
LOAD x1, 0 * REGBYTES(sp)
csrw sepc, x1
csrw SRC_XEPC, x1
LOAD x1, 2 * REGBYTES(sp)
csrw sstatus, x1
csrw SRC_XSTATUS, x1
LOAD x1, 1 * REGBYTES(sp)
@@ -152,12 +152,4 @@
.option pop
.endm
.macro OPEN_INTERRUPT
csrsi sstatus, 2
.endm
.macro CLOSE_INTERRUPT
csrci sstatus, 2
.endm
#endif