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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-07-04 14:06:29 +1000
committerPaul Mackerras <paulus@samba.org>2006-07-26 01:26:24 +1000
commitf0ca330bc4ce00377f940b786d7ec7d848dc4102 (patch)
treea07461c721eb08012f3997b1a91c4d3172d4d34c /arch/powerpc/kernel/prom_init.c
parentd1a8df9136ff55e554e11ce65854c282965be8f5 (diff)
downloadop-kernel-dev-f0ca330bc4ce00377f940b786d7ec7d848dc4102.zip
op-kernel-dev-f0ca330bc4ce00377f940b786d7ec7d848dc4102.tar.gz
[POWERPC] Workaround Pegasos incorrect ISA "ranges"
The Pegasos firmware doesn't create a valid "ranges" property for the ISA bridge, thus causing translation of ISA addresses and IO ports to fail. This fixes it, thus re-enabling proper early serial console to work on Pegasos. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
-rw-r--r--arch/powerpc/kernel/prom_init.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index ebd501a..b6c3ac2 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2030,6 +2030,39 @@ static void __init fixup_device_tree_maple(void)
#define fixup_device_tree_maple()
#endif
+#ifdef CONFIG_PPC_CHRP
+/* Pegasos lacks the "ranges" property in the isa node */
+static void __init fixup_device_tree_chrp(void)
+{
+ phandle isa;
+ u32 isa_ranges[6];
+ char *name;
+ int rc;
+
+ name = "/pci@80000000/isa@c";
+ isa = call_prom("finddevice", 1, 1, ADDR(name));
+ if (!PHANDLE_VALID(isa))
+ return;
+
+ rc = prom_getproplen(isa, "ranges");
+ if (rc != 0 && rc != PROM_ERROR)
+ return;
+
+ prom_printf("Fixing up missing ISA range on Pegasos...\n");
+
+ isa_ranges[0] = 0x1;
+ isa_ranges[1] = 0x0;
+ isa_ranges[2] = 0x01006000;
+ isa_ranges[3] = 0x0;
+ isa_ranges[4] = 0x0;
+ isa_ranges[5] = 0x00010000;
+ prom_setprop(isa, name, "ranges",
+ isa_ranges, sizeof(isa_ranges));
+}
+#else
+#define fixup_device_tree_chrp()
+#endif
+
#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
static void __init fixup_device_tree_pmac(void)
{
@@ -2077,6 +2110,7 @@ static void __init fixup_device_tree_pmac(void)
static void __init fixup_device_tree(void)
{
fixup_device_tree_maple();
+ fixup_device_tree_chrp();
fixup_device_tree_pmac();
}
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