diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2006-07-04 14:06:29 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-07-26 01:26:24 +1000 |
| commit | f0ca330bc4ce00377f940b786d7ec7d848dc4102 (patch) | |
| tree | a07461c721eb08012f3997b1a91c4d3172d4d34c /arch | |
| parent | d1a8df9136ff55e554e11ce65854c282965be8f5 (diff) | |
| download | linux-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')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index ebd501a59abdaf..b6c3ac20c14cb8 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(); } |