78 lines
2.3 KiB
Diff
78 lines
2.3 KiB
Diff
From: Olaf Hering <olh@suse.de>
|
|
Subject: new prom=nodisplay option to avoid crash in firmware on B50
|
|
Patch-mainline: not yet
|
|
|
|
add prom=nodisplay
|
|
avoid crash in firmware on IBM B50 when OF stdout is on serial.
|
|
|
|
0 > boot scsi/sd@4:1,yaboot |
|
|
yaboot starting: loaded at 00200000 00222530 (0/0/00c1a078; sp: 00efffd0)
|
|
brokenfirmware did not claim executable memory, fixed it myself
|
|
Config file 'yaboot.cnf' read, 213 bytes
|
|
|
|
Welcome to yaboot version 10.1.22-r945.SuSE
|
|
booted from '/pci@80000000/scsi@10/sd@4:1,yaboot'
|
|
Enter "help" to get some basic usage information
|
|
boot:
|
|
* linux
|
|
boot: linux 3
|
|
Please wait, loading kernel...
|
|
Allocated 00600000 bytes for executable @ 02000000
|
|
Elf32 kernel loaded...
|
|
Loading ramdisk...
|
|
ramdisk loaded 0030e057 @ 04100000
|
|
OF stdout device is: /pci@80000000/isa@b/serial@i3f8
|
|
command line: root=/dev/system/root xmon=on sysrq=1 quiet panic=12 3
|
|
memory layout at init:
|
|
memory_limit : 00000000 (16 MB aligned)
|
|
alloc_bottom : 0440f000
|
|
alloc_top : 30000000
|
|
alloc_top_hi : 40000000
|
|
rmo_top : 30000000
|
|
ram_top : 40000000
|
|
Looking for displays
|
|
found display : /pci@80000000/display@16, opening ...
|
|
Unexpected Firmware Error:
|
|
DEFAULT CATCH!, code=fff00300 at %SRR0: 00c18ccc %SRR1: 00003030
|
|
ok
|
|
0 > reset-all
|
|
|
|
|
|
---
|
|
arch/powerpc/kernel/prom_init.c | 10 ++++++++++
|
|
1 file changed, 10 insertions(+)
|
|
|
|
--- a/arch/powerpc/kernel/prom_init.c
|
|
+++ b/arch/powerpc/kernel/prom_init.c
|
|
@@ -169,6 +169,7 @@ static unsigned long __initdata dt_strin
|
|
|
|
static unsigned long __initdata prom_initrd_start, prom_initrd_end;
|
|
|
|
+static int __initdata prom_no_display;
|
|
#ifdef CONFIG_PPC64
|
|
static int __initdata prom_iommu_force_on;
|
|
static int __initdata prom_iommu_off;
|
|
@@ -596,6 +597,14 @@ static void __init early_cmdline_parse(v
|
|
#endif /* CONFIG_CMDLINE */
|
|
prom_printf("command line: %s\n", RELOC(prom_cmd_line));
|
|
|
|
+ opt = strstr(RELOC(prom_cmd_line), RELOC("prom="));
|
|
+ if (opt) {
|
|
+ opt += 5;
|
|
+ while (*opt && *opt == ' ')
|
|
+ opt++;
|
|
+ if (!strncmp(opt, RELOC("nodisplay"), 9))
|
|
+ RELOC(prom_no_display) = 1;
|
|
+ }
|
|
#ifdef CONFIG_PPC64
|
|
opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
|
|
if (opt) {
|
|
@@ -2570,6 +2579,7 @@ unsigned long __init prom_init(unsigned
|
|
/*
|
|
* Initialize display devices
|
|
*/
|
|
+ if (RELOC(prom_no_display) == 0)
|
|
prom_check_displays();
|
|
|
|
#ifdef CONFIG_PPC64
|