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-rw-r--r--arch/m68knommu/Kconfig7
-rw-r--r--arch/m68knommu/kernel/setup.c92
-rw-r--r--arch/m68knommu/kernel/vmlinux.lds.S47
-rw-r--r--arch/m68knommu/platform/523x/gpio.c5
-rw-r--r--arch/m68knommu/platform/527x/gpio.c6
-rw-r--r--arch/m68knommu/platform/528x/gpio.c2
-rw-r--r--arch/m68knommu/platform/coldfire/clk.c7
-rw-r--r--arch/m68knommu/platform/coldfire/head.S10
8 files changed, 135 insertions, 41 deletions
diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig
index e2201b90aa2..064f5913db1 100644
--- a/arch/m68knommu/Kconfig
+++ b/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
diff --git a/arch/m68knommu/kernel/setup.c b/arch/m68knommu/kernel/setup.c
index 5c2bb3eeaaa..ba92b90d5fb 100644
--- a/arch/m68knommu/kernel/setup.c
+++ b/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.
*/
diff --git a/arch/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S
index 2736a5e309c..9f1784f586b 100644
--- a/arch/m68knommu/kernel/vmlinux.lds.S
+++ b/arch/m68knommu/kernel/vmlinux.lds.S
@@ -8,6 +8,8 @@
*/
#include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
+#include <asm/thread_info.h>
#if defined(CONFIG_RAMKERNEL)
#define RAM_START CONFIG_KERNELBASE
@@ -15,7 +17,7 @@
#define TEXT ram
#define DATA ram
#define INIT ram
-#define BSS ram
+#define BSSS ram
#endif
#if defined(CONFIG_ROMKERNEL) || defined(CONFIG_HIMEMKERNEL)
#define RAM_START CONFIG_RAMBASE
@@ -27,7 +29,7 @@
#define TEXT rom
#define DATA ram
#define INIT ram
-#define BSS ram
+#define BSSS ram
#endif
#ifndef DATA_ADDR
@@ -147,40 +149,19 @@ SECTIONS {
. = ALIGN(4);
_sdata = . ;
DATA_DATA
- . = ALIGN(32);
- *(.data.cacheline_aligned)
- . = ALIGN(8192) ;
- *(.data.init_task)
+ CACHELINE_ALIGNED_DATA(32)
+ INIT_TASK_DATA(THREAD_SIZE)
_edata = . ;
} > DATA
- .init : {
- . = ALIGN(4096);
+ .init.text : {
+ . = ALIGN(PAGE_SIZE);
__init_begin = .;
- _sinittext = .;
- INIT_TEXT
- _einittext = .;
- INIT_DATA
- . = ALIGN(16);
- __setup_start = .;
- *(.init.setup)
- __setup_end = .;
- __initcall_start = .;
- INITCALLS
- __initcall_end = .;
- __con_initcall_start = .;
- *(.con_initcall.init)
- __con_initcall_end = .;
- __security_initcall_start = .;
- *(.security_initcall.init)
- __security_initcall_end = .;
-#ifdef CONFIG_BLK_DEV_INITRD
- . = ALIGN(4);
- __initramfs_start = .;
- *(.init.ramfs)
- __initramfs_end = .;
-#endif
- . = ALIGN(4096);
+ } > INIT
+ INIT_TEXT_SECTION(PAGE_SIZE) > INIT
+ INIT_DATA_SECTION(16) > INIT
+ .init.data : {
+ . = ALIGN(PAGE_SIZE);
__init_end = .;
} > INIT
@@ -192,7 +173,7 @@ SECTIONS {
. = ALIGN(4) ;
_ebss = . ;
_end = . ;
- } > BSS
+ } > BSSS
DISCARDS
}
diff --git a/arch/m68knommu/platform/523x/gpio.c b/arch/m68knommu/platform/523x/gpio.c
index f02840d54d3..a8842dc2783 100644
--- a/arch/m68knommu/platform/523x/gpio.c
+++ b/arch/m68knommu/platform/523x/gpio.c
@@ -30,7 +30,8 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
.direction_output = mcf_gpio_direction_output,
.get = mcf_gpio_get_value,
.set = mcf_gpio_set_value,
- .ngpio = 8,
+ .base = 1,
+ .ngpio = 7,
},
.pddr = MCFEPORT_EPDDR,
.podr = MCFEPORT_EPDR,
@@ -244,7 +245,7 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
.get = mcf_gpio_get_value,
.set = mcf_gpio_set_value_fast,
.base = 96,
- .ngpio = 4,
+ .ngpio = 8,
},
.pddr = MCFGPIO_PDDR_TIMER,
.podr = MCFGPIO_PODR_TIMER,
diff --git a/arch/m68knommu/platform/527x/gpio.c b/arch/m68knommu/platform/527x/gpio.c
index 1028142851a..0b56e19db0f 100644
--- a/arch/m68knommu/platform/527x/gpio.c
+++ b/arch/m68knommu/platform/527x/gpio.c
@@ -31,7 +31,8 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
.direction_output = mcf_gpio_direction_output,
.get = mcf_gpio_get_value,
.set = mcf_gpio_set_value,
- .ngpio = 8,
+ .base = 1,
+ .ngpio = 7,
},
.pddr = MCFEPORT_EPDDR,
.podr = MCFEPORT_EPDR,
@@ -263,7 +264,8 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
.direction_output = mcf_gpio_direction_output,
.get = mcf_gpio_get_value,
.set = mcf_gpio_set_value,
- .ngpio = 8,
+ .base = 1,
+ .ngpio = 7,
},
.pddr = MCFEPORT_EPDDR,
.podr = MCFEPORT_EPDR,
diff --git a/arch/m68knommu/platform/528x/gpio.c b/arch/m68knommu/platform/528x/gpio.c
index ec593950696..eedaf0adbcd 100644
--- a/arch/m68knommu/platform/528x/gpio.c
+++ b/arch/m68knommu/platform/528x/gpio.c
@@ -31,7 +31,7 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
.get = mcf_gpio_get_value,
.set = mcf_gpio_set_value,
.base = 1,
- .ngpio = 8,
+ .ngpio = 7,
},
.pddr = MCFEPORT_EPDDR,
.podr = MCFEPORT_EPDR,
diff --git a/arch/m68knommu/platform/coldfire/clk.c b/arch/m68knommu/platform/coldfire/clk.c
index 7cdbf445b28..9f1260c5e2a 100644
--- a/arch/m68knommu/platform/coldfire/clk.c
+++ b/arch/m68knommu/platform/coldfire/clk.c
@@ -9,6 +9,7 @@
/***************************************************************************/
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/clk.h>
#include <asm/coldfire.h>
@@ -18,23 +19,27 @@ struct clk *clk_get(struct device *dev, const char *id)
{
return NULL;
}
+EXPORT_SYMBOL(clk_get);
int clk_enable(struct clk *clk)
{
return 0;
}
+EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
}
+EXPORT_SYMBOL(clk_disable);
void clk_put(struct clk *clk)
{
}
+EXPORT_SYMBOL(clk_put);
unsigned long clk_get_rate(struct clk *clk)
{
return MCF_CLK;
}
-
+EXPORT_SYMBOL(clk_get_rate);
/***************************************************************************/
diff --git a/arch/m68knommu/platform/coldfire/head.S b/arch/m68knommu/platform/coldfire/head.S
index 2b0d73c0cc3..4b91aa24eb0 100644
--- a/arch/m68knommu/platform/coldfire/head.S
+++ b/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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 03:39:29 +0000