diff options
Diffstat (limited to 'packages/linux/ixp4xx-kernel/2.6.16/83-nas100d-memory-fixup.patch')
| -rw-r--r-- | packages/linux/ixp4xx-kernel/2.6.16/83-nas100d-memory-fixup.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/packages/linux/ixp4xx-kernel/2.6.16/83-nas100d-memory-fixup.patch b/packages/linux/ixp4xx-kernel/2.6.16/83-nas100d-memory-fixup.patch new file mode 100644 index 0000000000..3d5e20c6cf --- /dev/null +++ b/packages/linux/ixp4xx-kernel/2.6.16/83-nas100d-memory-fixup.patch @@ -0,0 +1,66 @@ +Include a fixup machine start function in nas100d-setup.c to handle +the command line and memory setup parameters which are not specifiable +in the boot loader. + +TODO: We must check what is actually passed by the stock +RedBoot on the nas100d. + +Signed-off-by: John Bowler <jbowler@acm.org> + + arch/arm/mach-ixp4xx/nas100d-setup.c | 33 +++++++++++++++++++++++++++++++++ + 1 file changed, 33 insertions(+) + +--- linux-ixp4xx.orig/arch/arm/mach-ixp4xx/nas100d-setup.c 2006-03-09 02:13:15.000000000 +0100 ++++ linux-ixp4xx/arch/arm/mach-ixp4xx/nas100d-setup.c 2006-03-09 02:13:54.000000000 +0100 +@@ -19,6 +19,7 @@ + #include <asm/mach-types.h> + #include <asm/mach/arch.h> + #include <asm/mach/flash.h> ++#include <asm/setup.h> + + static struct flash_platform_data nas100d_flash_data = { + .map_name = "cfi_probe", +@@ -125,11 +126,43 @@ static void __init nas100d_init(void) + platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices)); + } + ++/* ++ * NAS100D bootstrap may pass in parameters, but we zap the mem ++ * settings to be safe (the box always has 64MByte at 0). The ++ * passed in command line can override this default, we prepend ++ * to the config'ed default. ++ * ++ * 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 void __init nas100d_fixup(struct machine_desc *desc, ++ struct tag *tags, char **cmdline, struct meminfo *mi) ++{ ++ /* The NAS100D has one bank of 64MByte memory. ++ * NOTE: setting nr_banks != 0 causes kernel/setup.c to remove ++ * the mem tags from the tag list. We need do nothing here! ++ */ ++ mi->nr_banks = 1; ++ mi->bank[0].start = 0; ++ mi->bank[0].size = (64*1024*1024); ++ mi->bank[0].node = PHYS_TO_NID(0); ++} ++ + MACHINE_START(NAS100D, "Iomega NAS 100d") + /* Maintainer: www.nslu2-linux.org */ + .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS, + .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC, + .boot_params = 0x00000100, ++ .fixup = nas100d_fixup, + .map_io = ixp4xx_map_io, + .init_irq = ixp4xx_init_irq, + .timer = &ixp4xx_timer, |