MIPS qemu flash support.

* grub-core/boot/mips/startup_raw.S [GRUB_MACHINE_MIPS_QEMU_MIPS]: Check
	magic.
	* grub-core/kern/mips/qemu_mips/init.c (probe_mem): New function.
	(grub_machine_init): Probe memory if its size isn't known.
	* util/grub-mkimage.c (image_targets): Add flash targets.
	(generate_image): Handle flash targets.

ChangeLog

@@ -1,3 +1,14 @@
+2011-07-05  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	MIPS qemu flash support.
+
+	* grub-core/boot/mips/startup_raw.S [GRUB_MACHINE_MIPS_QEMU_MIPS]: Check
+	magic.
+	* grub-core/kern/mips/qemu_mips/init.c (probe_mem): New function.
+	(grub_machine_init): Probe memory if its size isn't known.
+	* util/grub-mkimage.c (image_targets): Add flash targets.
+	(generate_image): Handle flash targets.
+
 2011-07-05  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	MIPS qemu at_keyboard support.

grub-core/boot/mips/startup_raw.S

@@ -54,8 +54,22 @@ codestart:
 	/* Parse arguments. Has to be done before relocation.
 	So need to do it in asm.  */
 #ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
+	lui $t0, %hi (((16 << 20) - 264 + 4) | 0x80000000)
+	lw $t1, %lo (((16 << 20) - 264 + 4) | 0x80000000) ($t0)
+
+	lui $t2, 0x1234
+	ori $t2, 0x5678
+
+	bne $t1, $t2, 1f
+	 nop
+
 	lui $t0, %hi (((16 << 20) - 264) | 0x80000000)
+	b 2f
 	 lw $s4, %lo (((16 << 20) - 264) | 0x80000000) ($t0)
+	
+1:
+	li $s4, 0
+2:	
 #endif
 
 #ifdef GRUB_MACHINE_MIPS_LOONGSON

grub-core/kern/mips/qemu_mips/init.c

@@ -23,11 +23,36 @@ extern void grub_terminfo_init (void);
 extern void grub_keylayouts_init (void);
 extern void grub_boot_init (void);
 
+static inline int
+probe_mem (grub_addr_t addr)
+{
+  volatile grub_uint8_t *ptr = (grub_uint8_t *) (0xa0000000 | addr);
+  grub_uint8_t c = *ptr;
+  *ptr = 0xAA;
+  if (*ptr != 0xAA)
+    return 0;
+  *ptr = 0x55;
+  if (*ptr != 0x55)
+    return 0;
+  *ptr = c;
+  return 1;
+}
+
 void
 grub_machine_init (void)
 {
   grub_addr_t modend;
 
+  if (grub_arch_memsize == 0)
+    {
+      int i;
+      
+      for (i = 27; i >= 0; i--)
+	if (probe_mem (grub_arch_memsize | (1 << i)))
+	  grub_arch_memsize |= (1 << i);
+      grub_arch_memsize++;
+    }
+
   /* FIXME: measure this.  */
   grub_arch_cpuclock = 64000000;
 
@@ -40,7 +65,6 @@ grub_machine_init (void)
   grub_video_init ();
   grub_bitmap_init ();
   grub_font_init ();
-  grub_gfxterm_init ();
 
   grub_keylayouts_init ();
   grub_at_keyboard_init ();
@@ -49,6 +73,8 @@ grub_machine_init (void)
   grub_serial_init ();
 
   grub_boot_init ();
+
+  grub_gfxterm_init ();
 }
 
 void

util/grub-mkimage.c

@@ -67,7 +67,8 @@ struct image_target_desc
     IMAGE_I386_PC, IMAGE_EFI, IMAGE_COREBOOT,
     IMAGE_SPARC64_AOUT, IMAGE_SPARC64_RAW, IMAGE_I386_IEEE1275,
     IMAGE_LOONGSON_ELF, IMAGE_QEMU, IMAGE_PPC, IMAGE_YEELOONG_FLASH,
-    IMAGE_FULOONG_FLASH, IMAGE_I386_PC_PXE, IMAGE_MIPS_ARC
+    IMAGE_FULOONG_FLASH, IMAGE_I386_PC_PXE, IMAGE_MIPS_ARC,
+    IMAGE_QEMU_MIPS_FLASH
   } id;
   enum
     {
@@ -466,6 +467,50 @@ struct image_target_desc image_targets[] =
       .link_align = GRUB_KERNEL_MIPS_QEMU_MIPS_LINK_ALIGN,
       .default_compression = COMPRESSION_NONE
     },
+    {
+      .dirname = "mips-qemu_mips",
+      .names = { "mips-qemu_mips-flash", NULL },
+      .voidp_sizeof = 4,
+      .bigendian = 1,
+      .id = IMAGE_QEMU_MIPS_FLASH, 
+      .flags = PLATFORM_FLAGS_DECOMPRESSORS,
+      .prefix = GRUB_KERNEL_MIPS_QEMU_MIPS_PREFIX,
+      .prefix_end = GRUB_KERNEL_MIPS_QEMU_MIPS_PREFIX_END,
+      .raw_size = 0,
+      .total_module_size = GRUB_KERNEL_MIPS_QEMU_MIPS_TOTAL_MODULE_SIZE,
+      .compressed_size = TARGET_NO_FIELD,
+      .kernel_image_size = TARGET_NO_FIELD,
+      .section_align = 1,
+      .vaddr_offset = 0,
+      .install_dos_part = TARGET_NO_FIELD,
+      .install_bsd_part = TARGET_NO_FIELD,
+      .link_addr = GRUB_KERNEL_MIPS_QEMU_MIPS_LINK_ADDR,
+      .elf_target = EM_MIPS,
+      .link_align = GRUB_KERNEL_MIPS_QEMU_MIPS_LINK_ALIGN,
+      .default_compression = COMPRESSION_NONE
+    },
+    {
+      .dirname = "mipsel-qemu_mips",
+      .names = { "mipsel-qemu_mips-flash", NULL },
+      .voidp_sizeof = 4,
+      .bigendian = 0,
+      .id = IMAGE_QEMU_MIPS_FLASH, 
+      .flags = PLATFORM_FLAGS_DECOMPRESSORS,
+      .prefix = GRUB_KERNEL_MIPS_QEMU_MIPS_PREFIX,
+      .prefix_end = GRUB_KERNEL_MIPS_QEMU_MIPS_PREFIX_END,
+      .raw_size = 0,
+      .total_module_size = GRUB_KERNEL_MIPS_QEMU_MIPS_TOTAL_MODULE_SIZE,
+      .compressed_size = TARGET_NO_FIELD,
+      .kernel_image_size = TARGET_NO_FIELD,
+      .section_align = 1,
+      .vaddr_offset = 0,
+      .install_dos_part = TARGET_NO_FIELD,
+      .install_bsd_part = TARGET_NO_FIELD,
+      .link_addr = GRUB_KERNEL_MIPS_QEMU_MIPS_LINK_ADDR,
+      .elf_target = EM_MIPS,
+      .link_align = GRUB_KERNEL_MIPS_QEMU_MIPS_LINK_ALIGN,
+      .default_compression = COMPRESSION_NONE
+    },
     {
       .dirname = "mips-qemu_mips",
       .names = { "mips-qemu_mips-elf", NULL },
@@ -1389,6 +1434,28 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
       core_size = rom_size;
     }
     break;
+    case IMAGE_QEMU_MIPS_FLASH:
+    {
+      char *rom_img;
+      size_t rom_size;
+
+      if (core_size > 512 * 1024)
+	grub_util_error ("firmware image is too big");
+      rom_size = 512 * 1024;
+
+      rom_img = xmalloc (rom_size);
+      memset (rom_img, 0, rom_size); 
+
+      memcpy (rom_img, core_img, core_size);
+
+      memset (rom_img + core_size, 0,
+	      rom_size - core_size);
+
+      free (core_img);
+      core_img = rom_img;
+      core_size = rom_size;
+    }
+    break;
     case IMAGE_MIPS_ARC:
       {
 	char *ecoff_img;