[PATCH 2.6.17] Clean up and refactor i386 sub-architecture setup

From: Jeremy Fitzhardinge
Date: Tue Jun 20 2006 - 19:41:42 EST

From: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>

Clean up and refactor i386 sub-architecture setup.

This change moves all the code from the asm-i386/mach-*/setup_arch_pre/post.h headers, into arch/i386/mach-*/setup.c. mach-*/setup_arch_pre.h is renamed to setup_arch.h, and contains only things which should be in header files. It is purely code-motion; there should be no functional changes at all.

Several functions in arch/i386/kernel/setup.c needed to be made non-static so that they're visible to the code in mach-*/setup.c. asm-i386/setup.h is used to hold the prototypes for these functions.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

---
arch/i386/kernel/setup.c | 19 +-----
arch/i386/mach-default/setup.c | 43 +++++++++++++
arch/i386/mach-visws/setup.c | 49 +++++++++++++++
arch/i386/mach-voyager/setup.c | 74 ++++++++++++++++++++++++
include/asm-i386/mach-default/setup_arch.h | 5 +
include/asm-i386/mach-default/setup_arch_post.h | 40 ------------
include/asm-i386/mach-default/setup_arch_pre.h | 5 -
include/asm-i386/mach-visws/setup_arch.h | 5 +
include/asm-i386/mach-visws/setup_arch_post.h | 49 ---------------
include/asm-i386/mach-visws/setup_arch_pre.h | 5 -
include/asm-i386/mach-voyager/setup_arch.h | 10 +++
include/asm-i386/mach-voyager/setup_arch_post.h | 73 -----------------------
include/asm-i386/mach-voyager/setup_arch_pre.h | 10 ---
include/asm-i386/setup.h | 15 ++++
14 files changed, 206 insertions(+), 196 deletions(-)


diff -r 1b4d97a1b760 arch/i386/kernel/setup.c
--- a/arch/i386/kernel/setup.c Thu Jun 08 23:00:14 2006 +0000
+++ b/arch/i386/kernel/setup.c Tue Jun 13 17:35:21 2006 -0700
@@ -60,7 +60,7 @@
#include <asm/io_apic.h>
#include <asm/ist.h>
#include <asm/io.h>
-#include "setup_arch_pre.h"
+#include <setup_arch.h>
#include <bios_ebda.h>

/* Forward Declaration. */
@@ -410,8 +410,8 @@ static void __init limit_regions(unsigne
}
}

-static void __init add_memory_region(unsigned long long start,
- unsigned long long size, int type)
+void __init add_memory_region(unsigned long long start,
+ unsigned long long size, int type)
{
int x;

@@ -474,7 +474,7 @@ static struct e820entry *overlap_list[E8
static struct e820entry *overlap_list[E820MAX] __initdata;
static struct e820entry new_bios[E820MAX] __initdata;

-static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
+int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
{
struct change_member *change_tmp;
unsigned long current_type, last_type;
@@ -643,7 +643,7 @@ static int __init sanitize_e820_map(stru
* thinkpad 560x, for example, does not cooperate with the memory
* detection code.)
*/
-static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
+int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
{
/* Only one memory region (or negative)? Ignore it */
if (nr_map < 2)
@@ -700,12 +700,6 @@ static inline void copy_edd(void)
{
}
#endif
-
-/*
- * Do NOT EVER look at the BIOS memory size location.
- * It does not work on many machines.
- */
-#define LOWMEMSIZE() (0x9f000)

static void __init parse_cmdline_early (char ** cmdline_p)
{
@@ -1423,8 +1417,6 @@ static void __init register_memory(void)
pci_mem_start, gapstart, gapsize);
}

-static char * __init machine_specific_memory_setup(void);
-
#ifdef CONFIG_MCA
static void set_mca_bus(int x)
{
@@ -1602,7 +1594,6 @@ static __init int add_pcspkr(void)
}
device_initcall(add_pcspkr);

-#include "setup_arch_post.h"
/*
* Local Variables:
* mode:c
diff -r 1b4d97a1b760 arch/i386/mach-default/setup.c
--- a/arch/i386/mach-default/setup.c Thu Jun 08 23:00:14 2006 +0000
+++ b/arch/i386/mach-default/setup.c Tue Jun 13 17:35:21 2006 -0700
@@ -8,6 +8,8 @@
#include <linux/interrupt.h>
#include <asm/acpi.h>
#include <asm/arch_hooks.h>
+#include <asm/e820.h>
+#include <asm/setup.h>

#ifdef CONFIG_HOTPLUG_CPU
#define DEFAULT_SEND_IPI (1)
@@ -130,3 +132,44 @@ static int __init print_ipi_mode(void)
}

late_initcall(print_ipi_mode);
+
+/**
+ * machine_specific_memory_setup - Hook for machine specific memory setup.
+ *
+ * Description:
+ * This is included late in kernel/setup.c so that it can make
+ * use of all of the static functions.
+ **/
+
+char * __init machine_specific_memory_setup(void)
+{
+ char *who;
+
+
+ who = "BIOS-e820";
+
+ /*
+ * Try to copy the BIOS-supplied E820-map.
+ *
+ * Otherwise fake a memory map; one section from 0k->640k,
+ * the next section from 1mb->appropriate_mem_k
+ */
+ sanitize_e820_map(E820_MAP, &E820_MAP_NR);
+ if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
+ unsigned long mem_size;
+
+ /* compare results from other methods and take the greater */
+ if (ALT_MEM_K < EXT_MEM_K) {
+ mem_size = EXT_MEM_K;
+ who = "BIOS-88";
+ } else {
+ mem_size = ALT_MEM_K;
+ who = "BIOS-e801";
+ }
+
+ e820.nr_map = 0;
+ add_memory_region(0, LOWMEMSIZE(), E820_RAM);
+ add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+ }
+ return who;
+}
diff -r 1b4d97a1b760 arch/i386/mach-visws/setup.c
--- a/arch/i386/mach-visws/setup.c Thu Jun 08 23:00:14 2006 +0000
+++ b/arch/i386/mach-visws/setup.c Tue Jun 13 17:35:21 2006 -0700
@@ -10,6 +10,8 @@
#include <asm/fixmap.h>
#include <asm/arch_hooks.h>
#include <asm/io.h>
+#include <asm/e820.h>
+#include <asm/setup.h>
#include "cobalt.h"
#include "piix4.h"

@@ -133,3 +135,50 @@ void __init time_init_hook(void)
/* Wire cpu IDT entry to s/w handler (and Cobalt APIC to IDT) */
setup_irq(0, &irq0);
}
+
+/* Hook for machine specific memory setup. */
+
+#define MB (1024 * 1024)
+
+static unsigned long sgivwfb_mem_phys;
+static unsigned long sgivwfb_mem_size;
+
+long long mem_size __initdata = 0;
+
+char * __init machine_specific_memory_setup(void)
+{
+ long long gfx_mem_size = 8 * MB;
+
+ mem_size = ALT_MEM_K;
+
+ if (!mem_size) {
+ printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
+ mem_size = 128 * MB;
+ }
+
+ /*
+ * this hardcodes the graphics memory to 8 MB
+ * it really should be sized dynamically (or at least
+ * set as a boot param)
+ */
+ if (!sgivwfb_mem_size) {
+ printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
+ sgivwfb_mem_size = 8 * MB;
+ }
+
+ /*
+ * Trim to nearest MB
+ */
+ sgivwfb_mem_size &= ~((1 << 20) - 1);
+ sgivwfb_mem_phys = mem_size - gfx_mem_size;
+
+ add_memory_region(0, LOWMEMSIZE(), E820_RAM);
+ add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
+ add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
+
+ return "PROM";
+
+ /* Remove gcc warnings */
+ (void) sanitize_e820_map(NULL, NULL);
+ (void) copy_e820_map(NULL, 0);
+}
diff -r 1b4d97a1b760 arch/i386/mach-voyager/setup.c
--- a/arch/i386/mach-voyager/setup.c Thu Jun 08 23:00:14 2006 +0000
+++ b/arch/i386/mach-voyager/setup.c Tue Jun 13 17:35:21 2006 -0700
@@ -7,6 +7,9 @@
#include <linux/interrupt.h>
#include <asm/acpi.h>
#include <asm/arch_hooks.h>
+#include <asm/voyager.h>
+#include <asm/e820.h>
+#include <asm/setup.h>

void __init pre_intr_init_hook(void)
{
@@ -45,3 +48,74 @@ void __init time_init_hook(void)
{
setup_irq(0, &irq0);
}
+
+/* Hook for machine specific memory setup. */
+
+char * __init machine_specific_memory_setup(void)
+{
+ char *who;
+
+ who = "NOT VOYAGER";
+
+ if(voyager_level == 5) {
+ __u32 addr, length;
+ int i;
+
+ who = "Voyager-SUS";
+
+ e820.nr_map = 0;
+ for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
+ add_memory_region(addr, length, E820_RAM);
+ }
+ return who;
+ } else if(voyager_level == 4) {
+ __u32 tom;
+ __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
+ /* select the DINO config space */
+ outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
+ /* Read DINO top of memory register */
+ tom = ((inb(catbase + 0x4) & 0xf0) << 16)
+ + ((inb(catbase + 0x5) & 0x7f) << 24);
+
+ if(inb(catbase) != VOYAGER_DINO) {
+ printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
+ tom = (EXT_MEM_K)<<10;
+ }
+ who = "Voyager-TOM";
+ add_memory_region(0, 0x9f000, E820_RAM);
+ /* map from 1M to top of memory */
+ add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
+ /* FIXME: Should check the ASICs to see if I need to
+ * take out the 8M window. Just do it at the moment
+ * */
+ add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
+ return who;
+ }
+
+ who = "BIOS-e820";
+
+ /*
+ * Try to copy the BIOS-supplied E820-map.
+ *
+ * Otherwise fake a memory map; one section from 0k->640k,
+ * the next section from 1mb->appropriate_mem_k
+ */
+ sanitize_e820_map(E820_MAP, &E820_MAP_NR);
+ if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
+ unsigned long mem_size;
+
+ /* compare results from other methods and take the greater */
+ if (ALT_MEM_K < EXT_MEM_K) {
+ mem_size = EXT_MEM_K;
+ who = "BIOS-88";
+ } else {
+ mem_size = ALT_MEM_K;
+ who = "BIOS-e801";
+ }
+
+ e820.nr_map = 0;
+ add_memory_region(0, LOWMEMSIZE(), E820_RAM);
+ add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+ }
+ return who;
+}
diff -r 1b4d97a1b760 include/asm-i386/setup.h
--- a/include/asm-i386/setup.h Thu Jun 08 23:00:14 2006 +0000
+++ b/include/asm-i386/setup.h Tue Jun 13 17:35:21 2006 -0700
@@ -59,6 +59,21 @@ extern unsigned char boot_params[PARAM_S
#define EDD_MBR_SIGNATURE ((unsigned int *) (PARAM+EDD_MBR_SIG_BUF))
#define EDD_BUF ((struct edd_info *) (PARAM+EDDBUF))

+/*
+ * Do NOT EVER look at the BIOS memory size location.
+ * It does not work on many machines.
+ */
+#define LOWMEMSIZE() (0x9f000)
+
+struct e820entry;
+
+char * __init machine_specific_memory_setup(void);
+
+int __init copy_e820_map(struct e820entry * biosmap, int nr_map);
+int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map);
+void __init add_memory_region(unsigned long long start,
+ unsigned long long size, int type);
+
#endif /* __ASSEMBLY__ */

#endif /* _i386_SETUP_H */
diff -r 1b4d97a1b760 include/asm-i386/mach-default/setup_arch.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/asm-i386/mach-default/setup_arch.h Tue Jun 13 17:35:21 2006 -0700
@@ -0,0 +1,5 @@
+/* Hook to call BIOS initialisation function */
+
+/* no action for generic */
+
+#define ARCH_SETUP
diff -r 1b4d97a1b760 include/asm-i386/mach-visws/setup_arch.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/asm-i386/mach-visws/setup_arch.h Tue Jun 13 17:35:21 2006 -0700
@@ -0,0 +1,5 @@
+/* Hook to call BIOS initialisation function */
+
+/* no action for visws */
+
+#define ARCH_SETUP
diff -r 1b4d97a1b760 include/asm-i386/mach-voyager/setup_arch.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/asm-i386/mach-voyager/setup_arch.h Tue Jun 13 17:35:21 2006 -0700
@@ -0,0 +1,10 @@
+#include <asm/voyager.h>
+#define VOYAGER_BIOS_INFO ((struct voyager_bios_info *)(PARAM+0x40))
+
+/* Hook to call BIOS initialisation function */
+
+/* for voyager, pass the voyager BIOS/SUS info area to the detection + * routines */
+
+#define ARCH_SETUP voyager_detect(VOYAGER_BIOS_INFO);
+
diff -r 1b4d97a1b760 include/asm-i386/mach-default/setup_arch_post.h
--- a/include/asm-i386/mach-default/setup_arch_post.h Thu Jun 08 23:00:14 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-/**
- * machine_specific_memory_setup - Hook for machine specific memory setup.
- *
- * Description:
- * This is included late in kernel/setup.c so that it can make
- * use of all of the static functions.
- **/
-
-static char * __init machine_specific_memory_setup(void)
-{
- char *who;
-
-
- who = "BIOS-e820";
-
- /*
- * Try to copy the BIOS-supplied E820-map.
- *
- * Otherwise fake a memory map; one section from 0k->640k,
- * the next section from 1mb->appropriate_mem_k
- */
- sanitize_e820_map(E820_MAP, &E820_MAP_NR);
- if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
- unsigned long mem_size;
-
- /* compare results from other methods and take the greater */
- if (ALT_MEM_K < EXT_MEM_K) {
- mem_size = EXT_MEM_K;
- who = "BIOS-88";
- } else {
- mem_size = ALT_MEM_K;
- who = "BIOS-e801";
- }
-
- e820.nr_map = 0;
- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
- }
- return who;
-}
diff -r 1b4d97a1b760 include/asm-i386/mach-visws/setup_arch_post.h
--- a/include/asm-i386/mach-visws/setup_arch_post.h Thu Jun 08 23:00:14 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,49 +0,0 @@
-/* Hook for machine specific memory setup.
- *
- * This is included late in kernel/setup.c so that it can make use of all of
- * the static functions. */
-
-#define MB (1024 * 1024)
-
-unsigned long sgivwfb_mem_phys;
-unsigned long sgivwfb_mem_size;
-
-long long mem_size __initdata = 0;
-
-static char * __init machine_specific_memory_setup(void)
-{
- long long gfx_mem_size = 8 * MB;
-
- mem_size = ALT_MEM_K;
-
- if (!mem_size) {
- printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
- mem_size = 128 * MB;
- }
-
- /*
- * this hardcodes the graphics memory to 8 MB
- * it really should be sized dynamically (or at least
- * set as a boot param)
- */
- if (!sgivwfb_mem_size) {
- printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
- sgivwfb_mem_size = 8 * MB;
- }
-
- /*
- * Trim to nearest MB
- */
- sgivwfb_mem_size &= ~((1 << 20) - 1);
- sgivwfb_mem_phys = mem_size - gfx_mem_size;
-
- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
- add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
-
- return "PROM";
-
- /* Remove gcc warnings */
- (void) sanitize_e820_map(NULL, NULL);
- (void) copy_e820_map(NULL, 0);
-}
diff -r 1b4d97a1b760 include/asm-i386/mach-voyager/setup_arch_post.h
--- a/include/asm-i386/mach-voyager/setup_arch_post.h Thu Jun 08 23:00:14 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,73 +0,0 @@
-/* Hook for machine specific memory setup.
- *
- * This is included late in kernel/setup.c so that it can make use of all of
- * the static functions. */
-
-static char * __init machine_specific_memory_setup(void)
-{
- char *who;
-
- who = "NOT VOYAGER";
-
- if(voyager_level == 5) {
- __u32 addr, length;
- int i;
-
- who = "Voyager-SUS";
-
- e820.nr_map = 0;
- for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
- add_memory_region(addr, length, E820_RAM);
- }
- return who;
- } else if(voyager_level == 4) {
- __u32 tom;
- __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
- /* select the DINO config space */
- outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
- /* Read DINO top of memory register */
- tom = ((inb(catbase + 0x4) & 0xf0) << 16)
- + ((inb(catbase + 0x5) & 0x7f) << 24);
-
- if(inb(catbase) != VOYAGER_DINO) {
- printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
- tom = (EXT_MEM_K)<<10;
- }
- who = "Voyager-TOM";
- add_memory_region(0, 0x9f000, E820_RAM);
- /* map from 1M to top of memory */
- add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
- /* FIXME: Should check the ASICs to see if I need to
- * take out the 8M window. Just do it at the moment
- * */
- add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
- return who;
- }
-
- who = "BIOS-e820";
-
- /*
- * Try to copy the BIOS-supplied E820-map.
- *
- * Otherwise fake a memory map; one section from 0k->640k,
- * the next section from 1mb->appropriate_mem_k
- */
- sanitize_e820_map(E820_MAP, &E820_MAP_NR);
- if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
- unsigned long mem_size;
-
- /* compare results from other methods and take the greater */
- if (ALT_MEM_K < EXT_MEM_K) {
- mem_size = EXT_MEM_K;
- who = "BIOS-88";
- } else {
- mem_size = ALT_MEM_K;
- who = "BIOS-e801";
- }
-
- e820.nr_map = 0;
- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
- }
- return who;
-}
diff -r 1b4d97a1b760 include/asm-i386/mach-default/setup_arch_pre.h
--- a/include/asm-i386/mach-default/setup_arch_pre.h Thu Jun 08 23:00:14 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,5 +0,0 @@
-/* Hook to call BIOS initialisation function */
-
-/* no action for generic */
-
-#define ARCH_SETUP
diff -r 1b4d97a1b760 include/asm-i386/mach-visws/setup_arch_pre.h
--- a/include/asm-i386/mach-visws/setup_arch_pre.h Thu Jun 08 23:00:14 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,5 +0,0 @@
-/* Hook to call BIOS initialisation function */
-
-/* no action for visws */
-
-#define ARCH_SETUP
diff -r 1b4d97a1b760 include/asm-i386/mach-voyager/setup_arch_pre.h
--- a/include/asm-i386/mach-voyager/setup_arch_pre.h Thu Jun 08 23:00:14 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,10 +0,0 @@
-#include <asm/voyager.h>
-#define VOYAGER_BIOS_INFO ((struct voyager_bios_info *)(PARAM+0x40))
-
-/* Hook to call BIOS initialisation function */
-
-/* for voyager, pass the voyager BIOS/SUS info area to the detection - * routines */
-
-#define ARCH_SETUP voyager_detect(VOYAGER_BIOS_INFO);
-


-
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