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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.
Signed-off-by: John Bowler <jbowler@acm.org>
--- linux-2.6.15/arch/arm/mach-ixp4xx/nas100d-setup.c 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/arch/arm/mach-ixp4xx/nas100d-setup.c 1970-01-01 00:00:00.000000000 +0000
@@ -17,6 +17,8 @@
#include <linux/serial_8250.h>
#include <linux/mtd/mtd.h>
+#include <asm/setup.h>
+#include <asm/memory.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
@@ -164,12 +166,49 @@ 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.
+ */
+static void __init nas100d_fixup(struct machine_desc *desc,
+ struct tag *tags, char **cmdline, struct meminfo *mi)
+{
+ char saved_command_line[COMMAND_LINE_SIZE];
+ /* Put NAS100D specific known-required-for-certain stuff here, leave
+ * a trailing space!
+ */
+ static char nas100d_command_line[] =
+ "root=/dev/mtdblock2 rw rootfstype=jffs2 init=/linuxrc "
+ "pcf8563.hctosys=1 ";
+ const int len = (sizeof nas100d_command_line)-1;
+
+ /* The NAS100D has one bank of 32MByte 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);
+
+ /* A command line in the ATAG list will override this one,
+ * as is intended.
+ */
+ memcpy(saved_command_line, *cmdline, COMMAND_LINE_SIZE);
+ memcpy(*cmdline, nas100d_command_line, len);
+ memcpy(*cmdline + len, saved_command_line, COMMAND_LINE_SIZE - len);
+ *cmdline[COMMAND_LINE_SIZE-1] = 0;
+}
+
MACHINE_START(NAS100D, "Iomega NAS 100d")
/* Maintainer: www.nslu2-linux.org */
.phys_ram = PHYS_OFFSET,
.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,
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