diff options
| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-19 17:44:56 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 16:09:48 +1000 |
| commit | 817c21ad9a1f00926f080265493923ada3458c63 (patch) | |
| tree | 84733af08a403e6f1c1846a2e9a21cf49276660d /arch/powerpc/kernel | |
| parent | powerpc/powernv: Add OPAL takeover from PowerVM (diff) | |
| download | linux-dev-817c21ad9a1f00926f080265493923ada3458c63.tar.xz linux-dev-817c21ad9a1f00926f080265493923ada3458c63.zip | |
powerpc/powernv: Get kernel command line accross OPAL takeover
We stash it in boot_command_line which isn't in BSS and so won't
be overwritten. We then use that as a default cmd_line before
we walk the device-tree.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/prom_init_check.sh | 3 |
3 files changed, 13 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 174e1e96175e..7b90c564e932 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -712,6 +712,13 @@ void __init early_init_devtree(void *params) of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL); #endif + /* Pre-initialize the cmd_line with the content of boot_commmand_line, + * which will be empty except when the content of the variable has + * been overriden by a bootloading mechanism. This happens typically + * with HAL takeover + */ + strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); + /* Retrieve various informations from the /chosen node of the * device-tree, including the platform type, initrd location and * size, TCE reserve, and more ... diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 9369287aa8c2..e3f390427216 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -1449,6 +1449,10 @@ static void prom_opal_takeover(void) opal_addr = top_addr; args->hal_addr = opal_addr; + /* Copy the command line to the kernel image */ + strlcpy(RELOC(boot_command_line), RELOC(prom_cmd_line), + COMMAND_LINE_SIZE); + prom_debug(" k_image = 0x%lx\n", args->k_image); prom_debug(" k_size = 0x%lx\n", args->k_size); prom_debug(" k_entry = 0x%lx\n", args->k_entry); diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh index 20af6aada517..70f4286eaa7a 100644 --- a/arch/powerpc/kernel/prom_init_check.sh +++ b/arch/powerpc/kernel/prom_init_check.sh @@ -21,7 +21,8 @@ _end enter_prom memcpy memset reloc_offset __secondary_hold __secondary_hold_acknowledge __secondary_hold_spinloop __start strcmp strcpy strlcpy strlen strncmp strstr logo_linux_clut224 reloc_got2 kernstart_addr memstart_addr linux_banner _stext -opal_query_takeover opal_do_takeover opal_enter_rtas opal_secondary_entry" +opal_query_takeover opal_do_takeover opal_enter_rtas opal_secondary_entry +boot_command_line" NM="$1" OBJ="$2" |