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Subject[RFC PATCH 09/33] Add start-of-day setup hooks to subarch
Implement the start-of-day subarchitecture setup hooks for booting on
Xen. Add subarch macros for determining loader type and initrd
location.

Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

---
arch/i386/kernel/setup.c | 2 +
arch/i386/mach-default/Makefile | 2 -
arch/i386/mach-default/setup-memory.c | 43 ++++++++++++++++++++++
arch/i386/mach-default/setup.c | 43 ----------------------
arch/i386/mach-xen/Makefile | 2 -
arch/i386/mach-xen/setup-xen.c | 54 ++++++++++++++++++++++++++++
include/asm-i386/hypervisor.h | 4 ++
include/asm-i386/mach-default/mach_setup.h | 12 ++++++
include/asm-i386/mach-xen/mach_setup.h | 15 +++++++
include/asm-i386/mach-xen/setup_arch.h | 9 ++++
include/asm-i386/setup.h | 20 ++++++----
11 files changed, 153 insertions(+), 53 deletions(-)
diff -r a5848bce3730 arch/i386/kernel/setup.c
--- a/arch/i386/kernel/setup.c Thu Jun 22 16:02:54 2006 -0400
+++ b/arch/i386/kernel/setup.c Thu Jun 22 20:20:31 2006 -0400
@@ -458,6 +458,7 @@ static void __init print_memory_map(char
}
}

+#ifndef HAVE_ARCH_E820_SANITIZE
/*
* Sanitize the BIOS e820 map.
*
@@ -677,6 +678,7 @@ int __init copy_e820_map(struct e820entr
} while (biosmap++,--nr_map);
return 0;
}
+#endif

#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
struct edd edd;
diff -r a5848bce3730 arch/i386/mach-default/Makefile
--- a/arch/i386/mach-default/Makefile Thu Jun 22 16:02:54 2006 -0400
+++ b/arch/i386/mach-default/Makefile Thu Jun 22 20:20:31 2006 -0400
@@ -2,4 +2,4 @@
# Makefile for the linux kernel.
#

-obj-y := setup.o
+obj-y := setup.o setup-memory.o
diff -r a5848bce3730 arch/i386/mach-default/setup.c
--- a/arch/i386/mach-default/setup.c Thu Jun 22 16:02:54 2006 -0400
+++ b/arch/i386/mach-default/setup.c Thu Jun 22 20:20:31 2006 -0400
@@ -8,8 +8,6 @@
#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)
@@ -132,44 +130,3 @@ 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 a5848bce3730 arch/i386/mach-xen/Makefile
--- a/arch/i386/mach-xen/Makefile Thu Jun 22 16:02:54 2006 -0400
+++ b/arch/i386/mach-xen/Makefile Thu Jun 22 20:20:31 2006 -0400
@@ -2,6 +2,6 @@
# Makefile for the linux kernel.
#

-obj-y := setup.o
+obj-y := setup.o setup-xen.o

setup-y := ../mach-default/setup.o
diff -r a5848bce3730 include/asm-i386/hypervisor.h
--- a/include/asm-i386/hypervisor.h Thu Jun 22 16:02:54 2006 -0400
+++ b/include/asm-i386/hypervisor.h Thu Jun 22 20:20:31 2006 -0400
@@ -55,6 +55,10 @@ extern struct shared_info *HYPERVISOR_sh
extern struct shared_info *HYPERVISOR_shared_info;
extern struct start_info *xen_start_info;

+/* arch/i386/mach-xen/entry.S */
+extern void hypervisor_callback(void);
+extern void failsafe_callback(void);
+
/* arch/i386/mach-xen/evtchn.c */
/* Force a proper event-channel callback from Xen. */
extern void force_evtchn_callback(void);
diff -r a5848bce3730 include/asm-i386/setup.h
--- a/include/asm-i386/setup.h Thu Jun 22 16:02:54 2006 -0400
+++ b/include/asm-i386/setup.h Thu Jun 22 20:20:31 2006 -0400
@@ -49,10 +49,10 @@ extern unsigned char boot_params[PARAM_S
#define VIDEO_MODE (*(unsigned short *) (PARAM+0x1FA))
#define ORIG_ROOT_DEV (*(unsigned short *) (PARAM+0x1FC))
#define AUX_DEVICE_INFO (*(unsigned char *) (PARAM+0x1FF))
-#define LOADER_TYPE (*(unsigned char *) (PARAM+0x210))
+#define LOADER_TYPE MACH_LOADER_TYPE
#define KERNEL_START (*(unsigned long *) (PARAM+0x214))
-#define INITRD_START (*(unsigned long *) (PARAM+0x218))
-#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
+#define INITRD_START MACH_INITRD_START
+#define INITRD_SIZE MACH_INITRD_SIZE
#define EDID_INFO (*(struct edid_info *) (PARAM+0x140))
#define EDD_NR (*(unsigned char *) (PARAM+EDDNR))
#define EDD_MBR_SIG_NR (*(unsigned char *) (PARAM+EDD_MBR_SIG_NR_BUF))
@@ -65,15 +65,19 @@ extern unsigned char boot_params[PARAM_S
*/
#define LOWMEMSIZE() (0x9f000)

+extern unsigned long init_pg_tables_end;
+
struct e820entry;

-char * __init machine_specific_memory_setup(void);
+char * 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);
+int copy_e820_map(struct e820entry * biosmap, int nr_map);
+int sanitize_e820_map(struct e820entry * biosmap, char * pnr_map);
+void add_memory_region(unsigned long long start,
+ unsigned long long size, int type);

#endif /* __ASSEMBLY__ */

+#include <mach_setup.h>
+
#endif /* _i386_SETUP_H */
diff -r a5848bce3730 arch/i386/mach-default/setup-memory.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/i386/mach-default/setup-memory.c Thu Jun 22 20:20:31 2006 -0400
@@ -0,0 +1,44 @@
+#include <linux/init.h>
+#include <asm/e820.h>
+#include <asm/setup.h>
+
+/**
+ * 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 a5848bce3730 arch/i386/mach-xen/setup-xen.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/i386/mach-xen/setup-xen.c Thu Jun 22 20:20:31 2006 -0400
@@ -0,0 +1,54 @@
+/*
+ * Machine specific setup for xen
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+
+#include <asm/e820.h>
+#include <asm/setup.h>
+#include <asm/hypervisor.h>
+#include <asm/hypercall.h>
+
+#include <xen/interface/physdev.h>
+
+
+struct start_info *xen_start_info;
+EXPORT_SYMBOL(xen_start_info);
+
+/*
+ * Point at the empty zero page to start with. We map the real shared_info
+ * page as soon as fixmap is up and running.
+ */
+struct shared_info *HYPERVISOR_shared_info = (struct shared_info *)empty_zero_page;
+EXPORT_SYMBOL(HYPERVISOR_shared_info);
+
+/**
+ * machine_specific_memory_setup - Hook for machine specific memory setup.
+ **/
+
+char * __init machine_specific_memory_setup(void)
+{
+ unsigned long max_pfn = xen_start_info->nr_pages;
+
+ e820.nr_map = 0;
+ add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM);
+
+ return "Xen";
+}
+
+void __init machine_specific_arch_setup(void)
+{
+#ifdef CONFIG_ACPI
+ if (!(xen_start_info->flags & SIF_INITDOMAIN)) {
+ printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
+ acpi_disabled = 1;
+ acpi_ht = 0;
+ }
+#endif
+
+ memcpy(saved_command_line, xen_start_info->cmd_line,
+ MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ?
+ COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE);
+}
diff -r a5848bce3730 include/asm-i386/mach-default/mach_setup.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/asm-i386/mach-default/mach_setup.h Thu Jun 22 20:20:31 2006 -0400
@@ -0,0 +1,12 @@
+#ifndef __ASM_MACH_SETUP_H
+#define __ASM_MACH_SETUP_H
+
+#ifndef __ASSEMBLY__
+
+#define MACH_LOADER_TYPE (*(unsigned char *) (PARAM+0x210))
+#define MACH_INITRD_START (*(unsigned long *) (PARAM+0x218))
+#define MACH_INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_MACH_SETUP_H */
diff -r a5848bce3730 include/asm-i386/mach-xen/mach_setup.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/asm-i386/mach-xen/mach_setup.h Thu Jun 22 20:20:31 2006 -0400
@@ -0,0 +1,15 @@
+#ifndef __ASM_MACH_SETUP_H
+#define __ASM_MACH_SETUP_H
+
+#ifndef __ASSEMBLY__
+
+#include <xen/interface/xen.h>
+
+#define MACH_LOADER_TYPE 0x6e6558 /* "Xen" */
+#define MACH_INITRD_START \
+ (xen_start_info->mod_start ? __pa(xen_start_info->mod_start) : 0)
+#define MACH_INITRD_SIZE (xen_start_info->mod_len)
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_MACH_SETUP_H */
diff -r a5848bce3730 include/asm-i386/mach-xen/setup_arch.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/asm-i386/mach-xen/setup_arch.h Thu Jun 22 20:20:31 2006 -0400
@@ -0,0 +1,9 @@
+
+#define ARCH_SETUP machine_specific_arch_setup();
+
+extern struct start_info *xen_start_info;
+extern struct shared_info *HYPERVISOR_shared_info;
+
+void __init machine_specific_arch_setup(void);
+
+#define HAVE_ARCH_E820_SANITIZE
--
-
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