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

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@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Cc: Martin Bligh <mbligh@google.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Andrey Panin <pazke@donpac.ru>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 171 insertions, 14 deletions

diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index e6023970aa40..6c1639836e06 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -61,7 +61,7 @@
 #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. */
@@ -411,8 +411,8 @@ static void __init limit_regions(unsigned long long size)
         }
 }
 
-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;
 
@@ -475,7 +475,7 @@ static struct change_member *change_point[2*E820MAX] __initdata;
 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;
@@ -644,7 +644,7 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
  * 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)
@@ -702,12 +702,6 @@ 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)
 {
         char c = ' ', *to = command_line, *from = saved_command_line;
@@ -1424,8 +1418,6 @@ 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)
 {
@@ -1708,7 +1700,6 @@ static __init int add_pcspkr(void)
 }
 device_initcall(add_pcspkr);
 
-#include "setup_arch_post.h"
 /*
  * Local Variables:
  * mode:c
diff --git a/arch/i386/mach-default/setup.c b/arch/i386/mach-default/setup.c
index b4a7455c6993..004837c58793 100644
--- a/arch/i386/mach-default/setup.c
+++ b/arch/i386/mach-default/setup.c
@@ -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 --git a/arch/i386/mach-visws/setup.c b/arch/i386/mach-visws/setup.c
index 07fac7e749c7..8a9e1a6f745d 100644
--- a/arch/i386/mach-visws/setup.c
+++ b/arch/i386/mach-visws/setup.c
@@ -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 --git a/arch/i386/mach-voyager/setup.c b/arch/i386/mach-voyager/setup.c
index 7d8a3acb9441..0e225054e222 100644
--- a/arch/i386/mach-voyager/setup.c
+++ b/arch/i386/mach-voyager/setup.c
@@ -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;
+}