ia64 support

This patch adds support for kexec-tools on ia64. This patch applies on
top of -kdump7 patch from <http://lse.sourceforge.net/kdump/>.

Signed-off-by: Khalid Aziz <khalid.aziz@hp.com>
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/purgatory/arch/ia64/purgatory-ia64.c b/purgatory/arch/ia64/purgatory-ia64.c
index 369e175..8d2008c 100644
--- a/purgatory/arch/ia64/purgatory-ia64.c
+++ b/purgatory/arch/ia64/purgatory-ia64.c
@@ -1,10 +1,116 @@
 #include <purgatory.h>
+#include <stdint.h>
+#include <string.h>
 #include "purgatory-ia64.h"
 
+#define PAGE_OFFSET             0xe000000000000000
+
+typedef struct {
+        uint64_t signature;
+        uint32_t revision;
+        uint32_t headersize;
+        uint32_t crc32;
+        uint32_t reserved;
+} efi_table_hdr_t;
+
+typedef struct {
+        efi_table_hdr_t hdr;
+        unsigned long get_time;
+        unsigned long set_time;
+        unsigned long get_wakeup_time;
+        unsigned long set_wakeup_time;
+        unsigned long set_virtual_address_map;
+        unsigned long convert_pointer;
+        unsigned long get_variable;
+        unsigned long get_next_variable;
+        unsigned long set_variable;
+        unsigned long get_next_high_mono_count;
+        unsigned long reset_system;
+} efi_runtime_services_t;
+
+typedef struct {
+        efi_table_hdr_t hdr;
+        unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string
+ */
+        uint32_t fw_revision;
+        unsigned long con_in_handle;
+        unsigned long con_in;
+        unsigned long con_out_handle;
+        unsigned long con_out;
+        unsigned long stderr_handle;
+        unsigned long stderr;
+        unsigned long runtime;
+        unsigned long boottime;
+        unsigned long nr_tables;
+        unsigned long tables;
+} efi_system_table_t;
+
+struct ia64_boot_param {
+        uint64_t command_line;             /* physical address of command line arguments */
+        uint64_t efi_systab;               /* physical address of EFI system table */
+        uint64_t efi_memmap;               /* physical address of EFI memory map */
+        uint64_t efi_memmap_size;          /* size of EFI memory map */
+        uint64_t efi_memdesc_size;         /* size of an EFI memory map descriptor */
+        uint32_t efi_memdesc_version;      /* memory descriptor version */
+        struct {
+                uint16_t num_cols; /* number of columns on console output device */
+                uint16_t num_rows; /* number of rows on console output device */
+                uint16_t orig_x;   /* cursor's x position */
+                uint16_t orig_y;   /* cursor's y position */
+        } console_info;
+        uint64_t fpswa;            /* physical address of the fpswa interface */
+        uint64_t initrd_start;
+        uint64_t initrd_size;
+};
+
 void setup_arch(void)
 {
 	/* Nothing for now */
 }
+inline unsigned long PA(unsigned long addr)
+{
+	return addr - PAGE_OFFSET;
+}
+
+void flush_icache_range(char *start, unsigned long len)
+{
+	unsigned long i;
+	for (i = 0;i < len; i += 32)
+	  asm volatile("fc.i %0"::"r"(start+i):"memory");
+	asm volatile (";;sync.i;;":::"memory");
+	asm volatile ("srlz.i":::"memory");
+}
+
+extern char __dummy_efi_function[], __dummy_efi_function_end[];
+
+void ia64_env_setup(struct ia64_boot_param *boot_param,
+	uint64_t command_line, uint64_t command_line_len,
+	uint64_t ramdisk_base, uint64_t ramdisk_size)
+{
+	unsigned long len;
+        efi_system_table_t *systab;
+        efi_runtime_services_t *runtime;
+	unsigned long *set_virtual_address_map;
+
+	// patch efi_runtime->set_virtual_address_map to a
+	// dummy function
+	len = __dummy_efi_function_end - __dummy_efi_function;
+	memcpy((char *)command_line + command_line_len, __dummy_efi_function,
+	len);
+	systab = (efi_system_table_t *)boot_param->efi_systab;
+	runtime = (efi_runtime_services_t *)PA(systab->runtime);
+	set_virtual_address_map =
+		(unsigned long *)PA(runtime->set_virtual_address_map);
+	*(set_virtual_address_map)=
+		(unsigned long)((char *)command_line + command_line_len);
+	flush_icache_range((char *)command_line+command_line_len, len);
+
+	boot_param->command_line = command_line;
+	boot_param->console_info.orig_x = 0;
+	boot_param->console_info.orig_y = 0;
+	boot_param->initrd_start = ramdisk_base;
+	boot_param->initrd_size =  ramdisk_size;
+}
 
 /* This function can be used to execute after the SHA256 verification. */
 void post_verification_setup_arch(void)