[src/trunk]: src/sys/arch/riscv/riscv Shuffle some register usage

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a30faeb82d6c
branches:  trunk
changeset: 371877:a30faeb82d6c
user:      skrll <skrll%NetBSD.org@localhost>
date:      Sat Oct 15 16:34:29 2022 +0000

description:
Shuffle some register usage

diffstat:

 sys/arch/riscv/riscv/locore.S |  20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

diffs (57 lines):

diff -r 24ebd2b3ebf9 -r a30faeb82d6c sys/arch/riscv/riscv/locore.S
--- a/sys/arch/riscv/riscv/locore.S     Sat Oct 15 16:29:56 2022 +0000
+++ b/sys/arch/riscv/riscv/locore.S     Sat Oct 15 16:34:29 2022 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: locore.S,v 1.33 2022/10/15 16:29:56 skrll Exp $ */
+/* $NetBSD: locore.S,v 1.34 2022/10/15 16:34:29 skrll Exp $ */
 
 /*-
  * Copyright (c) 2014, 2022 The NetBSD Foundation, Inc.
@@ -94,8 +94,8 @@
        mv      s1, a1                  // copy dtb PA
 
        /* set the stack pointer for boot */
-       PTR_LA  s8, _C_LABEL(bootstk)
-       mv      sp, s8
+       PTR_LA  t0, _C_LABEL(bootstk)
+       mv      sp, t0
 
        VPRINTS("\n------------\nNetBSD start\n\n")
        VPRINTS("sp:      ")
@@ -115,10 +115,10 @@
         * Calculate the difference between the VA and PA for start and
         * keep in s8.  Store this in kern_vtopdiff once the MMU is on.
         */
-       PTR_LA  s11, start
+       PTR_LA  t0, start
        PTR_L   s8, .Lstart
 
-       sub     s8, s8, s11
+       sub     s8, s8, t0
 
        PTR_LA  s5, _C_LABEL(lwp0uspace)
        PTR_LA  s6, _C_LABEL(bootstk)
@@ -330,9 +330,9 @@
        PTR_LA  a0, _C_LABEL(cpu_exception_handler)
        csrw    stvec, a0
 
-       PTR_LA  s2, bootstk             // top of lwp0uspace
-       PTR_S   s2, L_PCB(tp)           // set uarea of lwp (already zeroed)
-       addi    sp, s2, -TF_LEN         // switch to new stack
+       PTR_LA  t0, bootstk             // top of lwp0uspace
+       PTR_S   t0, L_PCB(tp)           // set uarea of lwp (already zeroed)
+       addi    sp, t0, -TF_LEN         // switch to new stack
        PTR_S   sp, L_MD_UTF(tp)        // store pointer to empty trapframe
 
        PTR_LA  t1, _C_LABEL(kernel_pmap_store)
@@ -345,8 +345,8 @@
         * Store kern_vtopdiff (the difference between the physical
         * and virtual address of the "start" symbol).
         */
-       PTR_LA  s11, _C_LABEL(kern_vtopdiff)
-       PTR_S   s8, 0(s11)      /* kern_vtopdiff = start(virt) - start(phys) */
+       PTR_LA  t0, _C_LABEL(kern_vtopdiff)
+       PTR_S   s8, 0(t0)       /* kern_vtopdiff = start(virt) - start(phys) */
 
 #if notyet
        mv      a0, s1                  // dtb