From b4ee48740558a52e411dfbfa26ea61082b52814c Mon Sep 17 00:00:00 2001 From: John Bowler Date: Tue, 17 Jan 2006 20:37:52 +0000 Subject: ixp4xx-kernel: improve fixup patches, remove loft one, add cmdline byteswap in 2.6.15 - the fixup patches for NSLU2 and NAS100D have been slightly simplified. the fixup for Loft has been removed, it isn't useful. code in arch/arm/kernel/setup.c to automagically swap the command line has been added in 48-setup-byteswap-cmdline.patch --- .../ixp4xx-kernel/2.6.15/94-nslu2-setup.patch | 55 +++++++++++----------- 1 file changed, 28 insertions(+), 27 deletions(-) (limited to 'packages/linux/ixp4xx-kernel/2.6.15/94-nslu2-setup.patch') diff --git a/packages/linux/ixp4xx-kernel/2.6.15/94-nslu2-setup.patch b/packages/linux/ixp4xx-kernel/2.6.15/94-nslu2-setup.patch index 0ed39d9302..55aad7c440 100644 --- a/packages/linux/ixp4xx-kernel/2.6.15/94-nslu2-setup.patch +++ b/packages/linux/ixp4xx-kernel/2.6.15/94-nslu2-setup.patch @@ -15,47 +15,48 @@ Signed-off-by: John Bowler #include #include #include -@@ -165,12 +167,52 @@ static void __init nslu2_init(void) +@@ -165,12 +167,53 @@ static void __init nslu2_init(void) platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices)); } +/* -+ * NSLU2 RedBoot passes garbage atag/parameter values - i.e. r2 -+ * on entry is not useable - so we get to set the right values -+ * here... ++ * NSLU2 RedBoot passes garbage atag/parameter values because it copies ++ * the kernel zImage on top of the parameter list before branching into ++ * the zImage. The machine description causes the ATAG list to be ++ * skipped (by setting boot_params to 0) and this code fixes up the ++ * memory info and command line by supplying a command line with the ++ * NSLU2 specific config prepended. ++ * ++ * NOTE: the startup sequence is: ++ * 1) Call the machine fixup ++ * 2) Parse the ATAG list, the ATAG_CMDLINE is copied in ++ * to default_command_line which is the value of *from ++ * 3) Parse the command line in *from (*not* ++ * default_command_line unless they are the same!) ++ * ++ * Setting mi->nr_banks causes (2) to 'squash' (set to ATAG_NONE) ++ * any ATAG_MEM tags, but mem= command line options cause nr_banks ++ * to be reset to 0 (on the first mem=) + */ ++static char nslu2_command_line[] __initdata = ++ "root=/dev/mtdblock4 rootfstype=jffs2 init=/linuxrc " ++ "rtc-x1205.probe=0,0x6f rtc-x1205.hctosys=1 " ++ CONFIG_CMDLINE; ++ +static void __init nslu2_fixup(struct machine_desc *desc, + struct tag *tags, char **cmdline, struct meminfo *mi) +{ -+ char saved_command_line[COMMAND_LINE_SIZE]; -+ /* Put NSLU2 specific known-required-for-certain stuff here, leave -+ * a trailing space! -+ */ -+ static char nslu2_command_line[] = -+ "root=/dev/mtdblock4 rw rootfstype=jffs2 init=/linuxrc " -+ "rtc-x1205.probe=0,0x6f rtc-x1205.hctosys=1 "; -+ const int len = (sizeof nslu2_command_line)-1; -+ + /* The NSLU2 has one bank of 32MByte memory. -+ * NOTE: this will totally destroy attempts to make fatslugs work, -+ * FATSLUG FATSLUG FATSLUG: please parameterise this! -+ * NOTE: setting nr_banks != 0 causes kernel/setup.c to remove -+ * the mem tags from the tag list. We need do nothing here! ++ * NOTE: to make a 'fatslug' work append the appropriate ++ * mem= to the CONFIG_CMDLINE - this will override the ++ * setting below. + */ + mi->nr_banks=1; + mi->bank[0].start = 0; + mi->bank[0].size = (32*1024*1024); + mi->bank[0].node = PHYS_TO_NID(0); + -+ /* The tag list is the one from kernel/setup.c, it has no -+ * command line, so we are free to make one up, do this by -+ * prepending to the default command line which has been -+ * passed in (so that can override if necessary). -+ */ -+ memcpy(saved_command_line, *cmdline, COMMAND_LINE_SIZE); -+ memcpy(*cmdline, nslu2_command_line, len); -+ memcpy(*cmdline + len, saved_command_line, COMMAND_LINE_SIZE - len); -+ *cmdline[COMMAND_LINE_SIZE-1] = 0; ++ strlcpy(*cmdline, nslu2_command_line, COMMAND_LINE_SIZE); +} + MACHINE_START(NSLU2, "Linksys NSLU2") @@ -64,7 +65,7 @@ Signed-off-by: John Bowler .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS, .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC, - .boot_params = 0x00000100, -+ .boot_params = 0, /* because they are garbage */ ++ .boot_params = 0, /* because they are garbage - see above */ + .fixup = nslu2_fixup, .map_io = ixp4xx_map_io, .init_irq = ixp4xx_init_irq, -- cgit v1.2.3