Module Name: src
Committed By: macallan
Date: Fri Aug 17 16:04:39 UTC 2018
Modified Files:
src/sys/arch/macppc/stand/ofwboot: Locore.c
Log Message:
- add some G5-specific setup
- OF_claim() more heap space on G5
With this, and -DHEAP_VARIABLE my G5s boot from harddisk
To generate a diff of this commit:
cvs rdiff -u -r1.31 -r1.32 src/sys/arch/macppc/stand/ofwboot/Locore.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/macppc/stand/ofwboot/Locore.c
diff -u src/sys/arch/macppc/stand/ofwboot/Locore.c:1.31 src/sys/arch/macppc/stand/ofwboot/Locore.c:1.32
--- src/sys/arch/macppc/stand/ofwboot/Locore.c:1.31 Wed Jun 6 23:50:29 2018
+++ src/sys/arch/macppc/stand/ofwboot/Locore.c Fri Aug 17 16:04:39 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: Locore.c,v 1.31 2018/06/06 23:50:29 uwe Exp $ */
+/* $NetBSD: Locore.c,v 1.32 2018/08/17 16:04:39 macallan Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -35,6 +35,7 @@
#include <lib/libsa/stand.h>
#include <machine/cpu.h>
+#include <powerpc/oea/spr.h>
#include "openfirm.h"
@@ -81,9 +82,13 @@ __asm(
" mfspr %r0,287 \n" /* mfpvbr %r0 PVR = 287 */
" srwi %r0,%r0,0x10 \n"
" cmpi 0,1,%r0,0x02 \n" /* 601 CPU = 0x0001 */
-" blt 1f \n" /* skip over non-601 BAT setup */
+" blt 2f \n" /* skip over non-601 BAT setup */
+" cmpi 0,1,%r0,0x39 \n" /* PPC970 */
+" blt 0f \n"
+" cmpi 0,1,%r0,0x45 \n" /* PPC970GX */
+" ble 1f \n"
/* non PPC 601 BATs */
-" li %r0,0 \n"
+"0: li %r0,0 \n"
" mtibatu 0,%r0 \n"
" mtibatu 1,%r0 \n"
" mtibatu 2,%r0 \n"
@@ -99,10 +104,31 @@ __asm(
" li %r9,0x1ffe \n" /* BATU(0, BAT_BL_256M, BAT_Vs) */
" mtibatu 0,%r9 \n"
" mtdbatu 0,%r9 \n"
-" b 2f \n"
-
+" b 3f \n"
+ /* 970 initialization stuff */
+"1: \n"
+ /* make sure we're in bridge mode */
+" clrldi %r8,%r8,3 \n"
+" mtmsrd %r8 \n"
+" isync \n"
+ /* clear HID5 DCBZ bits (56/57), need to do this early */
+" mfspr %r9,0x3f6 \n"
+" rldimi %r9,0,6,56 \n"
+" sync \n"
+" mtspr 0x3f6,%r9 \n"
+" isync \n"
+" sync \n"
+ /* Setup HID1 features, prefetch + i-cacheability controlled by PTE */
+" mfspr %r9,0x3f1 \n"
+" li %r11,0x1200 \n"
+" sldi %r11,%r11,44 \n"
+" or %r9,%r9,%r11 \n"
+" mtspr 0x3f1,%r9 \n"
+" isync \n"
+" sync \n"
+" b 3f \n"
/* PPC 601 BATs */
-"1: li %r0,0 \n"
+"2: li %r0,0 \n"
" mtibatu 0,%r0 \n"
" mtibatu 1,%r0 \n"
" mtibatu 2,%r0 \n"
@@ -134,7 +160,7 @@ __asm(
" addi %r9,%r9,0x1a \n"
" mtibatu 3,%r9 \n"
" \n"
-"2: isync \n"
+"3: isync \n"
" \n"
" mtmsr %r8 \n"
" isync \n"
@@ -649,7 +675,13 @@ setup(void)
OF_exit();
#ifdef HEAP_VARIABLE
- heapspace = OF_claim(0, HEAP_SIZE, NBPG);
+ uint32_t pvr, vers, hsize = HEAP_SIZE;
+
+ __asm volatile ("mfpvr %0" : "=r"(pvr));
+ vers = pvr >> 16;
+ if (vers >= IBM970 && vers <= IBM970GX) hsize = 0x800000;
+
+ heapspace = OF_claim(0, hsize, NBPG);
if (heapspace == (char *)-1) {
panic("Failed to allocate heap");
}
