[src/trunk]: src/sys/arch/arm32/riscpc Implement a workaround in initarm() fo...

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

details:   https://anonhg.NetBSD.org/src/rev/762b45283222
branches:  trunk
changeset: 473300:762b45283222
user:      mark <mark%NetBSD.org@localhost>
date:      Fri May 28 09:59:31 1999 +0000

description:
Implement a workaround in initarm() for a problem that stopped ARM610
and some ARM710 processors from completing their initial bootstrap.
Fixes PR7595.

diffstat:

 sys/arch/arm32/riscpc/rpc_machdep.c |  41 ++++++++++++++++++++++++++++--------
 1 files changed, 32 insertions(+), 9 deletions(-)

diffs (95 lines):

diff -r 3f5434f85889 -r 762b45283222 sys/arch/arm32/riscpc/rpc_machdep.c
--- a/sys/arch/arm32/riscpc/rpc_machdep.c       Fri May 28 08:07:12 1999 +0000
+++ b/sys/arch/arm32/riscpc/rpc_machdep.c       Fri May 28 09:59:31 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rpc_machdep.c,v 1.28 1999/05/27 09:04:11 mark Exp $    */
+/*     $NetBSD: rpc_machdep.c,v 1.29 1999/05/28 09:59:31 mark Exp $    */
 
 /*
  * Copyright (c) 1994-1998 Mark Brinicombe.
@@ -583,14 +583,24 @@
            bootconfig.scratchphysicalbase + 0x1000);
 
        /* Print some debugging info */
-
-/*
-       printf("page tables look like this ...\n");
+/*     printf("page tables look like this ...\n");
        printf("V0x00000000 - %08x\n", ReadWord(l1pagetable + 0x0000));
+       printf("V0x00100000 - %08x\n", ReadWord(l1pagetable + 0x0004));
+       printf("V0x00200000 - %08x\n", ReadWord(l1pagetable + 0x0008));
+       printf("V0x00300000 - %08x\n", ReadWord(l1pagetable + 0x000C));
        printf("V0x03500000 - %08x\n", ReadWord(l1pagetable + 0x00d4));
        printf("V0x00200000 - %08x\n", ReadWord(l1pagetable + 0x0080));
+       printf("V0xf0000000 - %08x\n", ReadWord(l1pagetable + 0x3c00));
+       printf("V0xf0100000 - %08x\n", ReadWord(l1pagetable + 0x3c04));
+       printf("V0xf0200000 - %08x\n", ReadWord(l1pagetable + 0x3c08));
+       printf("V0xf0300000 - %08x\n", ReadWord(l1pagetable + 0x3c0C));
+       printf("V0xf1000000 - %08x\n", ReadWord(l1pagetable + 0x3c40));
+       printf("V0xf2000000 - %08x\n", ReadWord(l1pagetable + 0x3c80));
+       printf("V0xf3000000 - %08x\n", ReadWord(l1pagetable + 0x3cc0));
        printf("V0xf4000000 - %08x\n", ReadWord(l1pagetable + 0x3d00));
-       printf("V0xf0000000 - %08x\n", ReadWord(l1pagetable + 0x3c00));
+       printf("V0xf5000000 - %08x\n", ReadWord(l1pagetable + 0x3d40));
+       printf("V0xf6000000 - %08x\n", ReadWord(l1pagetable + 0x3d80));
+       printf("V0xf7000000 - %08x\n", ReadWord(l1pagetable + 0x3dc0));
        printf("page dir = P%08x\n", bootconfig.scratchphysicalbase + 0x4000);
        printf("l1= V%08x\n", l1pagetable);
 */
@@ -866,9 +876,20 @@
        l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL] - physical_start;
 
        if (N_GETMAGIC(kernexec[0]) == ZMAGIC) {
+               /*
+                * This is a work around for a recent problem that occurred
+                * with ARM 610 processors and some ARM 710 processors
+                * Other ARM 710 and StrongARM processors don't have a problem.
+                */
+#if defined(CPU_ARM6) || defined(CPU_ARM7)
+               logical = map_chunk(0, l2pagetable, KERNEL_TEXT_BASE,
+                   physical_start, kernexec->a_text,
+                   AP_KRW, PT_CACHEABLE);
+#else  /* CPU_ARM6 || CPU_ARM7 */
                logical = map_chunk(0, l2pagetable, KERNEL_TEXT_BASE,
                    physical_start, kernexec->a_text,
                    AP_KR, PT_CACHEABLE);
+#endif /* CPU_ARM6 || CPU_ARM7 */
                logical += map_chunk(0, l2pagetable, KERNEL_TEXT_BASE + logical,
                    physical_start + logical, kerneldatasize - kernexec->a_text,
                    AP_KRW, PT_CACHEABLE);
@@ -953,21 +974,23 @@
        map_section(l1pagetable, IO_BASE, IO_HW_BASE, 0);
 
        /* Bit more debugging info */
-
 /*     printf("page tables look like this ...\n");
        printf("V0x00000000 - %08x\n", ReadWord(l1pagetable + 0x0000));
        printf("V0x03200000 - %08x\n", ReadWord(l1pagetable + 0x00c8));
        printf("V0x03500000 - %08x\n", ReadWord(l1pagetable + 0x00d4));
        printf("V0xf0000000 - %08x\n", ReadWord(l1pagetable + 0x3c00));
+       printf("V0xf0100000 - %08x\n", ReadWord(l1pagetable + 0x3c04));
        printf("V0xf1000000 - %08x\n", ReadWord(l1pagetable + 0x3c40));
        printf("V0xf2000000 - %08x\n", ReadWord(l1pagetable + 0x3c80));
        printf("V0xf3000000 - %08x\n", ReadWord(l1pagetable + 0x3cc0));
        printf("V0xf3300000 - %08x\n", ReadWord(l1pagetable + 0x3ccc));
        printf("V0xf4000000 - %08x\n", ReadWord(l1pagetable + 0x3d00));
+       printf("V0xf5000000 - %08x\n", ReadWord(l1pagetable + 0x3d40));
        printf("V0xf6000000 - %08x\n", ReadWord(l1pagetable + 0x3d80));
+       printf("V0xf7000000 - %08x\n", ReadWord(l1pagetable + 0x3dc0));
+       printf("V0xefc00000 - %08x\n", ReadWord(l1pagetable + 0x3bf8));
+       printf("V0xef800000 - %08x\n", ReadWord(l1pagetable + 0x3bfc));
 */
-/*     printf("V0xefc00000 - %08x\n", ReadWord(l1pagetable + 0x3bf8));
-       printf("V0xef800000 - %08x\n", ReadWord(l1pagetable + 0x3bfc));*/
 
        /*
         * Now we have the real page tables in place so we can switch to them.
@@ -1000,7 +1023,7 @@
         * may have just been remapped and thus the cache could be out
         * of sync. A re-clean after the switch will cure this.
         * After booting there are no gross reloations of the kernel thus
-        * this problem wil not occur after initarm().
+        * this problem will not occur after initarm().
         */
        cpu_cache_cleanID();