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[src/trunk]: src/sys/arch/riscv/riscv Revamp to the point it builds, but need...
details: https://anonhg.NetBSD.org/src/rev/3a2f000bf34f
branches: trunk
changeset: 945926:3a2f000bf34f
user: skrll <skrll%NetBSD.org@localhost>
date: Tue Nov 10 06:58:46 2020 +0000
description:
Revamp to the point it builds, but needs more work
diffstat:
sys/arch/riscv/riscv/spl.S | 108 ++++++++++++++++++++++----------------------
1 files changed, 55 insertions(+), 53 deletions(-)
diffs (185 lines):
diff -r d99cf3c617d3 -r 3a2f000bf34f sys/arch/riscv/riscv/spl.S
--- a/sys/arch/riscv/riscv/spl.S Tue Nov 10 04:27:22 2020 +0000
+++ b/sys/arch/riscv/riscv/spl.S Tue Nov 10 06:58:46 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: spl.S,v 1.4 2020/11/04 07:09:46 skrll Exp $ */
+/* $NetBSD: spl.S,v 1.5 2020/11/10 06:58:46 skrll Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -32,41 +32,40 @@
#include <machine/asm.h>
#include "assym.h"
-__RCSID("$NetBSD: spl.S,v 1.4 2020/11/04 07:09:46 skrll Exp $")
+__RCSID("$NetBSD: spl.S,v 1.5 2020/11/10 06:58:46 skrll Exp $")
+#if notyet
.data
- .globl _C_LABEL(ipl_sr_map)
- .type _C_LABEL(ipl_sr_map), @object
+ .globl _C_LABEL(ipl_si_map)
+ .type _C_LABEL(ipl_si_map), @object
.p2align INT_SCALESHIFT
-_C_LABEL(ipl_sr_map):
- .word 0 /* IPL_NONE */
- .word 0 /* IPL_SOFTCLOCK */
- .word 0 /* IPL_SOFTBIO */
- .word 0 /* IPL_SOFTNET */
- .word 0 /* IPL_SOFTSERIAL */
- .word SR_IM /* IPL_VM */
- .word SR_IM /* IPL_SCHED */
- .word SR_IM /* IPL_DDB */
- .word SR_IM /* IPL_HIGH */
+_C_LABEL(ipl_si_map):
+ .word 0 /* IPL_NONE */
+ .word 0 /* IPL_SOFTCLOCK */
+ .word 0 /* IPL_SOFTBIO */
+ .word 0 /* IPL_SOFTNET */
+ .word 0 /* IPL_SOFTSERIAL */
+ .word SI_EXTERAL /* IPL_VM */
+ .word SI_EXTERNAL | SI_TIMER /* IPL_SCHED */
+ .word SI_EXTERNAL | SI_SOFTWARE | SI_TIMER /* IPL_HIGH */
+#endif
ENTRY_NP(splx)
// a0 = new lower IPL
+ csrci sstatus, SR_SIE // disable interrupts
PTR_L a3, L_CPU(tp) // get curcpu()
INT_L t0, CI_CPL(a3) // get current IPL
beq a0, t0, 2f
-.L_splset:
+
// a0 = new ipl
- PTR_LA t0, ipl_sr_map
- slli a1, a0, 2 // make integer index
- add t0, t0, a1 // index into table
- INT_L t0, (t0) // get new mask bits to clear
- li t2, SR_IM // get mask bits
- xor t0, t0, t2 // invert mask bits
- csrc sstatus, t2 // block everything
INT_S a0, CI_CPL(a3) // change IPL
beqz t0, 2f
- csrs sstatus, t0 // unmask appropriate bits
-2: INT_L t4, CI_SOFTINTS(a3) // get softint mask
+
+ //call riscv_do_pending_irqs
+2:
+ csrsi sstatus, SR_SIE // enable interrupts
+
+ INT_L t4, CI_SOFTINTS(a3) // get softint mask
srl t4, t4, a0 // see what softints are pending.
beqz t4, 3f // none, just return
// there are softints that need to be delivered, so instead of
@@ -74,79 +73,82 @@
// will do a tailcall back to splx and then we can return (if there
// are no pending softints).
tail _C_LABEL(softint_deliver)
-3: ret // return (or do softints)
+3:
+ ret // return (or do softints)
END(splx)
#if IPL_NONE != 0
#error IPL_NONE is not 0
#endif
ENTRY_NP(spl0)
+ csrci sstatus, SR_SIE // disable interrupts
PTR_L a3, L_CPU(tp) // get curcpu()
- li t0, SR_IM|SR_EI // load SR_IM|EI
- csrci sstatus, SR_EI // disable interrupts
INT_S zero, CI_CPL(a3) // set current IPL to IPL_NONE
- csrs sstatus, t0 // unmask all & enable interrupts
+
+ //call riscv_do_pending_irqs
+
+ csrsi sstatus, SR_SIE // enable interrupts
// spl0() is only called rarely so the overhead of always calling
// softint_deliver is minimal.
tail _C_LABEL(softint_deliver)
END(spl0)
ENTRY_NP(splhigh)
+ csrci sstatus, SR_SIE // disable interrupts
PTR_L a3, L_CPU(tp) // get curcpu()
- INT_L a0, CI_CPL(a3) // get current IPL
- li t1, SR_IM // load SR_IM
+ INT_L a0, CI_CPL(a3) // get current IPL for return value
li t0, IPL_HIGH //
- csrc sstatus, t1 // mask all interrupts
INT_S t0, CI_CPL(a3) // set it to IPL_HIGH
+ // interrupts remain disabled???
ret
END(splhigh)
+
ENTRY_NP(splsoftclock)
- li a0, IPL_SOFTCLOCK
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_SOFTCLOCK
+ j _splraise
END(splsoftclock)
ENTRY_NP(splsoftbio)
- li a0, IPL_SOFTBIO
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_SOFTBIO
+ j _splraise
END(splsoftbio)
ENTRY_NP(splsoftnet)
- li a0, IPL_SOFTNET
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_SOFTNET
+ j _splraise
END(splsoftnet)
ENTRY_NP(splsoftserial)
- li a0, IPL_SOFTSERIAL
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_SOFTSERIAL
+ j _splraise
END(splsoftserial)
ENTRY_NP(splvm)
- li a0, IPL_VM
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_VM
+ j _splraise
END(splvm)
ENTRY_NP(splsched)
- li a0, IPL_SCHED
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_SCHED
+ j _splraise
END(splsched)
ENTRY_NP(splddb)
- li a0, IPL_DDB
- PTR_L a3, L_CPU(tp) // get curcpu()
- j .L_splset
+ li t0, IPL_DDB
+ j _splraise
END(splddb)
ENTRY_NP(splraise)
+ // a0 = new higher IPL
mv t0, a0 // need a0 for return value
+_splraise:
+ csrci sstatus, SR_SIE // disable interrupts
PTR_L a3, L_CPU(tp) // get curcpu()
INT_L a0, CI_CPL(a3) // get current IPL
- bgt t0, a0, .L_splset // set if new IPL is higher
+ bge a0, t0, 2f // already at same or higher?
+ INT_S t0, CI_CPL(a3) // change IPL
+2:
+ csrsi sstatus, SR_SIE // enable interrupts
ret
END(splraise)
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