---

yaml
---
r: 173527
b: refs/heads/master
c: 588baea
h: refs/heads/master
i:
  173525: 7e0641c
  173523: 67158d3
  173519: 1d4705c
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b0d22d66fd485316653b8db4c16139eeae5a0266
+refs/heads/master: 588baeac38829304390b690142376d2c71ac5c9f

trunk/arch/m68knommu/Kconfig

@@ -533,6 +533,13 @@ config AVNET
 	default y
 	depends on (AVNET5282)
 
+config UBOOT
+	bool "Support for U-Boot command line parameters"
+	help
+	  If you say Y here kernel will try to collect command
+	  line parameters from the initial u-boot stack.
+	default n
+
 config 4KSTACKS
 	bool "Use 4Kb for kernel stacks instead of 8Kb"
 	default y

trunk/arch/m68knommu/kernel/setup.c

@@ -29,6 +29,8 @@
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/root_dev.h>
 
 #include <asm/setup.h>
 #include <asm/irq.h>
@@ -52,7 +54,6 @@ void (*mach_reset)(void);
 void (*mach_halt)(void);
 void (*mach_power_off)(void);
 
-
 #ifdef CONFIG_M68000
 	#define CPU "MC68000"
 #endif
@@ -111,6 +112,69 @@ void (*mach_power_off)(void);
 extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
 extern int _ramstart, _ramend;
 
+#if defined(CONFIG_UBOOT)
+/*
+ * parse_uboot_commandline
+ *
+ * Copies u-boot commandline arguments and store them in the proper linux
+ * variables.
+ *
+ * Assumes:
+ *	_init_sp global contains the address in the stack pointer when the
+ *	kernel starts (see head.S::_start)
+ *
+ *	U-Boot calling convention:
+ *	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
+ *
+ *	_init_sp can be parsed as such
+ *
+ *	_init_sp+00 = u-boot cmd after jsr into kernel (skip)
+ *	_init_sp+04 = &kernel board_info (residual data)
+ *	_init_sp+08 = &initrd_start
+ *	_init_sp+12 = &initrd_end
+ *	_init_sp+16 = &cmd_start
+ *	_init_sp+20 = &cmd_end
+ *
+ *	This also assumes that the memory locations pointed to are still
+ *	unmodified. U-boot places them near the end of external SDRAM.
+ *
+ * Argument(s):
+ *	commandp = the linux commandline arg container to fill.
+ *	size     = the sizeof commandp.
+ *
+ * Returns:
+ */
+void parse_uboot_commandline(char *commandp, int size)
+{
+	extern unsigned long _init_sp;
+	unsigned long *sp;
+	unsigned long uboot_kbd;
+	unsigned long uboot_initrd_start, uboot_initrd_end;
+	unsigned long uboot_cmd_start, uboot_cmd_end;
+
+
+	sp = (unsigned long *)_init_sp;
+	uboot_kbd = sp[1];
+	uboot_initrd_start = sp[2];
+	uboot_initrd_end = sp[3];
+	uboot_cmd_start = sp[4];
+	uboot_cmd_end = sp[5];
+
+	if (uboot_cmd_start && uboot_cmd_end)
+		strncpy(commandp, (const char *)uboot_cmd_start, size);
+#if defined(CONFIG_BLK_DEV_INITRD)
+	if (uboot_initrd_start && uboot_initrd_end &&
+		(uboot_initrd_end > uboot_initrd_start)) {
+		initrd_start = uboot_initrd_start;
+		initrd_end = uboot_initrd_end;
+		ROOT_DEV = Root_RAM0;
+		printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
+			initrd_start, initrd_end);
+	}
+#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
+}
+#endif /* #if defined(CONFIG_UBOOT) */
+
 void __init setup_arch(char **cmdline_p)
 {
 	int bootmap_size;
@@ -128,7 +192,24 @@ void __init setup_arch(char **cmdline_p)
 #if defined(CONFIG_BOOTPARAM)
 	strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 	command_line[sizeof(command_line) - 1] = 0;
-#endif
+#endif /* CONFIG_BOOTPARAM */
+
+#if defined(CONFIG_UBOOT)
+	/* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
+	#if defined(CONFIG_BOOTPARAM)
+		/* Add the whitespace separator */
+		command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
+		/* Parse uboot command line into the rest of the buffer */
+		parse_uboot_commandline(
+			&command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
+			(sizeof(command_line) -
+			(strlen(CONFIG_BOOTPARAM_STRING)+1)));
+	/* Only CONFIG_UBOOT defined, create cmdline */
+	#else
+		parse_uboot_commandline(&command_line[0], sizeof(command_line));
+	#endif /* CONFIG_BOOTPARAM */
+	command_line[sizeof(command_line) - 1] = 0;
+#endif /* CONFIG_UBOOT */
 
 	printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU "\n");
 
@@ -204,6 +285,13 @@ void __init setup_arch(char **cmdline_p)
 	free_bootmem(memory_start, memory_end - memory_start);
 	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 
+#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
+	if ((initrd_start > 0) && (initrd_start < initrd_end) &&
+			(initrd_end < memory_end))
+		reserve_bootmem(initrd_start, initrd_end - initrd_start,
+				 BOOTMEM_DEFAULT);
+#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
+
 	/*
 	 * Get kmalloc into gear.
 	 */

trunk/arch/m68knommu/platform/coldfire/head.S

@@ -106,6 +106,9 @@
 .global _ramvec
 .global	_ramstart
 .global	_ramend
+#if defined(CONFIG_UBOOT)
+.global	_init_sp
+#endif
 
 /*****************************************************************************/
 
@@ -124,6 +127,10 @@ _ramstart:
 .long	0
 _ramend:
 .long	0
+#if defined(CONFIG_UBOOT)
+_init_sp:
+.long	0
+#endif
 
 /*****************************************************************************/
 
@@ -137,6 +144,9 @@ __HEAD
 _start:
 	nop					/* filler */
 	movew	#0x2700, %sr			/* no interrupts */
+#if defined(CONFIG_UBOOT)
+	movel	%sp,_init_sp			/* save initial stack pointer */
+#endif
 
 	/*
 	 *	Do any platform or board specific setup now. Most boards