ata.lst

au1200下的boot代码

GAS LISTING /tmp/ccpN3UVf.s 			page 1


   1              		.section .mdebug.abi32
   2              		.previous
   3              		.section	.debug_abbrev,"",@progbits
   4              	$Ldebug_abbrev0:
   5              		.section	.debug_info,"",@progbits
   6              	$Ldebug_info0:
   7              		.section	.debug_line,"",@progbits
   8              	$Ldebug_line0:
   9 0000 49010000 		.text
   9      02009600 
   9      00000101 
   9      FB0E0A00 
   9      01010101 
  10              	$Ltext0:
  11              		.align	2
  12              		.globl	ata_wait_busy
  13              		.ent	ata_wait_busy
  14              		.type	ata_wait_busy, @function
  15              	ata_wait_busy:
  16              	$LFB2:
  17              		.file 1 "/mnt/hgfs/boot/booter/source/ata.c"
   1:/mnt/hgfs/boot/booter/source/ata.c **** #include "example.h"
   2:/mnt/hgfs/boot/booter/source/ata.c **** #include "ata.h"
   3:/mnt/hgfs/boot/booter/source/ata.c **** 
   4:/mnt/hgfs/boot/booter/source/ata.c **** void __inline ata_wait_busy(volatile uint8* status)
   5:/mnt/hgfs/boot/booter/source/ata.c **** {
  18              		.loc 1 5 0
  19              		.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
  20              		.mask	0x00000000,0
  21              		.fmask	0x00000000,0
  22              		.set	noreorder
  23              		.set	nomacro
  24              		
  25              	$L2:
   6:/mnt/hgfs/boot/booter/source/ata.c **** 	while(*status & ATA_STATUS_BSY);	// wait for not busy
  26              		.loc 1 6 0
  27 0000 00008290 		lbu	$2,0($4)
  28 0004 00160200 		sll	$2,$2,24
  29 0008 03160200 		sra	$2,$2,24
  30 000c FCFF4004 		bltz	$2,$L2
  31 0010 00000000 		nop
  32              	
  33 0014 0800E003 		j	$31
  34 0018 00000000 		nop
  35              	
  36              		.set	macro
  37              		.set	reorder
  38              	$LFE2:
  39              		.end	ata_wait_busy
  40              		.section	.rodata.str1.4,"aMS",@progbits,1
  41              		.align	2
  42              	$LC0:
  43 0000 53656374 		.ascii	"Sector %d\n\000"
  43      6F722025 
  43      640A00
  44 000b 00       		.text
  45              		.align	2
GAS LISTING /tmp/ccpN3UVf.s 			page 2


  46              		.globl	ata_dump_sectors
  47              		.ent	ata_dump_sectors
  48              		.type	ata_dump_sectors, @function
  49              	ata_dump_sectors:
  50              	$LFB3:
   7:/mnt/hgfs/boot/booter/source/ata.c **** }
   8:/mnt/hgfs/boot/booter/source/ata.c **** 
   9:/mnt/hgfs/boot/booter/source/ata.c **** int ata_dump_sectors(short* buf, int sect, int n)
  10:/mnt/hgfs/boot/booter/source/ata.c **** {
  51              		.loc 1 10 0
  52              		.frame	$sp,40,$31		# vars= 0, regs= 6/0, args= 16, gp= 0
  53              		.mask	0x801f0000,-4
  54              		.fmask	0x00000000,0
  55              		.set	noreorder
  56              		.set	nomacro
  57              		
  58 001c D8FFBD27 		addiu	$sp,$sp,-40
  59              	$LCFI0:
  60 0020 2000B4AF 		sw	$20,32($sp)
  61              	$LCFI1:
  62 0024 1C00B3AF 		sw	$19,28($sp)
  63              	$LCFI2:
  64 0028 1400B1AF 		sw	$17,20($sp)
  65              	$LCFI3:
  66 002c 2400BFAF 		sw	$31,36($sp)
  67              	$LCFI4:
  68 0030 1800B2AF 		sw	$18,24($sp)
  69              	$LCFI5:
  70 0034 1000B0AF 		sw	$16,16($sp)
  71              	$LCFI6:
  72              		.loc 1 10 0
  73 0038 21A0C000 		move	$20,$6
  74 003c 2198A000 		move	$19,$5
  11:/mnt/hgfs/boot/booter/source/ata.c **** 	int i;
  12:/mnt/hgfs/boot/booter/source/ata.c **** 	for(i = 0; i < n; ++i)
  75              		.loc 1 12 0
  76 0040 0D00C018 		blez	$6,$L11
  77 0044 21880000 		move	$17,$0
  78              	
  79 0048 21808000 		move	$16,$4
  80 004c 0000123C 		lui	$18,%hi($LC0)
  81              	$L9:
  82              	$LBB2:
  13:/mnt/hgfs/boot/booter/source/ata.c **** 	{
  14:/mnt/hgfs/boot/booter/source/ata.c **** 		printf("Sector %d\n", sect+i);
  83              		.loc 1 14 0
  84 0050 21287102 		addu	$5,$19,$17
  85 0054 0000000C 		jal	printf
  86 0058 00004426 		addiu	$4,$18,%lo($LC0)
  87              	
  88              	$LBE2:
  89              		.loc 1 12 0
  90 005c 01003126 		addiu	$17,$17,1
  91              	$LBB3:
  15:/mnt/hgfs/boot/booter/source/ata.c **** 		dump_memory(&buf[i*SECTOR_SIZE], SECTOR_SIZE);
  92              		.loc 1 15 0
  93 0060 21200002 		move	$4,$16
GAS LISTING /tmp/ccpN3UVf.s 			page 3


  94 0064 0000000C 		jal	dump_memory
  95 0068 00020524 		li	$5,512			# 0x200
  96              	
  97              	$LBE3:
  98              		.loc 1 12 0
  99 006c 2A183402 		slt	$3,$17,$20
 100 0070 F7FF6014 		bne	$3,$0,$L9
 101 0074 00041026 		addiu	$16,$16,1024
 102              	
 103              	$L11:
  16:/mnt/hgfs/boot/booter/source/ata.c **** 	}
  17:/mnt/hgfs/boot/booter/source/ata.c **** }
 104              		.loc 1 17 0
 105 0078 2400BF8F 		lw	$31,36($sp)
 106 007c 2000B48F 		lw	$20,32($sp)
 107 0080 1C00B38F 		lw	$19,28($sp)
 108 0084 1800B28F 		lw	$18,24($sp)
 109 0088 1400B18F 		lw	$17,20($sp)
 110 008c 1000B08F 		lw	$16,16($sp)
 111 0090 0800E003 		j	$31
 112 0094 2800BD27 		addiu	$sp,$sp,40
 113              	
 114              		.set	macro
 115              		.set	reorder
 116              	$LFE3:
 117              		.end	ata_dump_sectors
 118              		.align	2
 119              		.globl	ata_read_sector
 120              		.ent	ata_read_sector
 121              		.type	ata_read_sector, @function
 122              	ata_read_sector:
 123              	$LFB4:
  18:/mnt/hgfs/boot/booter/source/ata.c **** 
  19:/mnt/hgfs/boot/booter/source/ata.c **** int ata_read_sector(void* base, int sect, int n, short *buf, int reg_size)
  20:/mnt/hgfs/boot/booter/source/ata.c **** {
 124              		.loc 1 20 0
 125              		.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
 126              		.mask	0x00000000,0
 127              		.fmask	0x00000000,0
 128              		.set	noreorder
 129              		.set	nomacro
 130              		
 131              		.loc 1 20 0
 132 0098 1000AC8F 		lw	$12,16($sp)
 133 009c 21588000 		move	$11,$4
 134 00a0 2170A000 		move	$14,$5
 135              	$LBB4:
 136              		.loc 1 5 0
 137 00a4 C0680C00 		sll	$13,$12,3
 138 00a8 2310AC01 		subu	$2,$13,$12
 139              	$LBE4:
 140              		.loc 1 20 0
 141 00ac 2178C000 		move	$15,$6
 142 00b0 21C0E000 		move	$24,$7
 143              	$LBB5:
 144              		.loc 1 5 0
 145 00b4 21184400 		addu	$3,$2,$4
GAS LISTING /tmp/ccpN3UVf.s 			page 4


 146              	$L13:
 147              	$LBB6:
 148              		.loc 1 6 0
 149 00b8 00006290 		lbu	$2,0($3)
 150 00bc 00160200 		sll	$2,$2,24
 151 00c0 03160200 		sra	$2,$2,24
  21:/mnt/hgfs/boot/booter/source/ata.c **** //	DPRINTF("\n");
  22:/mnt/hgfs/boot/booter/source/ata.c **** 	volatile uint8* regs = (volatile uint8*) base;
  23:/mnt/hgfs/boot/booter/source/ata.c **** 
  24:/mnt/hgfs/boot/booter/source/ata.c **** 	ata_wait_busy(&regs[reg_size*ATA_REG_STATUS]);
  25:/mnt/hgfs/boot/booter/source/ata.c **** 
  26:/mnt/hgfs/boot/booter/source/ata.c **** 	//setup sector to read from
  27:/mnt/hgfs/boot/booter/source/ata.c **** 	regs[reg_size*ATA_REG_FEATURES]		= 0;
  28:/mnt/hgfs/boot/booter/source/ata.c **** 	regs[reg_size*ATA_REG_SECTOR_COUNT] 	= n;
 152              		.loc 1 28 0
 153              		.loc 1 6 0
 154 00c4 FCFF4004 		bltz	$2,$L13
 155 00c8 40280C00 		sll	$5,$12,1
 156              	
 157              	$LBE6:
 158              	$LBE5:
  29:/mnt/hgfs/boot/booter/source/ata.c **** 	regs[reg_size*ATA_REG_SECTOR_NUMBER]	= (sect >> 0)  & 0xff;
  30:/mnt/hgfs/boot/booter/source/ata.c **** 	regs[reg_size*ATA_REG_CYLINDER_LOW]	= (sect >> 8)  & 0xff;
  31:/mnt/hgfs/boot/booter/source/ata.c **** 	regs[reg_size*ATA_REG_CYLINDER_HIGH]	= (sect >> 16) & 0xff;
  32:/mnt/hgfs/boot/booter/source/ata.c **** 	regs[reg_size*ATA_REG_DEVICE_HEAD]	= (sect >> 24) & 0x0f | 0xe0;
 159              		.loc 1 32 0
 160 00cc 031E0E00 		sra	$3,$14,24
 161              		.loc 1 29 0
 162 00d0 2130AC00 		addu	$6,$5,$12
 163              		.loc 1 30 0
 164 00d4 80200C00 		sll	$4,$12,2
 165              		.loc 1 32 0
 166 00d8 E0FF0224 		li	$2,-32
 167 00dc 0F006330 		andi	$3,$3,0xf
 168              		.loc 1 31 0
 169 00e0 21388C00 		addu	$7,$4,$12
 170              		.loc 1 32 0
 171 00e4 40400600 		sll	$8,$6,1
 172 00e8 25186200 		or	$3,$3,$2
 173              		.loc 1 27 0
 174 00ec 21506C01 		addu	$10,$11,$12
 175              		.loc 1 30 0
 176 00f0 03120E00 		sra	$2,$14,8
 177              		.loc 1 28 0
 178 00f4 2128AB00 		addu	$5,$5,$11
 179              		.loc 1 29 0
 180 00f8 2130CB00 		addu	$6,$6,$11
 181              		.loc 1 30 0
 182 00fc 21208B00 		addu	$4,$4,$11
 183              		.loc 1 27 0
 184 0100 000040A1 		sb	$0,0($10)
 185              		.loc 1 31 0
 186 0104 2138EB00 		addu	$7,$7,$11
 187              		.loc 1 28 0
 188 0108 0000AFA0 		sb	$15,0($5)
 189              		.loc 1 32 0
 190 010c 21400B01 		addu	$8,$8,$11
GAS LISTING /tmp/ccpN3UVf.s 			page 5


 191              		.loc 1 29 0
 192 0110 0000CEA0 		sb	$14,0($6)
 193              		.loc 1 31 0
 194 0114 034C0E00 		sra	$9,$14,16
 195              		.loc 1 30 0
 196 0118 000082A0 		sb	$2,0($4)
  33:/mnt/hgfs/boot/booter/source/ata.c **** 
  34:/mnt/hgfs/boot/booter/source/ata.c ****     if (n == 1)
 197              		.loc 1 34 0
 198 011c 01000224 		li	$2,1			# 0x1
 199              		.loc 1 31 0
 200 0120 0000E9A0 		sb	$9,0($7)
 201              		.loc 1 32 0
 202 0124 000003A1 		sb	$3,0($8)
  35:/mnt/hgfs/boot/booter/source/ata.c ****         regs[reg_size*ATA_REG_COMMAND] = 0x21;
 203              		.loc 1 35 0
 204              		.loc 1 34 0
 205 0128 2900E211 		beq	$15,$2,$L29
 206 012c 2310AC01 		subu	$2,$13,$12
 207              	
  36:/mnt/hgfs/boot/booter/source/ata.c ****     else
  37:/mnt/hgfs/boot/booter/source/ata.c ****         regs[reg_size*ATA_REG_COMMAND] = 0xc4;
 208              		.loc 1 37 0
 209 0130 21104B00 		addu	$2,$2,$11
 210 0134 C4FF0324 		li	$3,-60
 211              	$L28:
 212 0138 000043A0 		sb	$3,0($2)
 213              	$LBB7:
 214              		.loc 1 5 0
 215 013c 2310AC01 		subu	$2,$13,$12
 216 0140 21184B00 		addu	$3,$2,$11
 217              	$L18:
 218              	$LBB8:
 219              		.loc 1 6 0
 220 0144 00006290 		lbu	$2,0($3)
 221 0148 00160200 		sll	$2,$2,24
 222 014c 03160200 		sra	$2,$2,24
 223 0150 FCFF4004 		bltz	$2,$L18
 224 0154 2320AC01 		subu	$4,$13,$12
 225              	
 226              	$LBE8:
 227              	$LBE7:
 228 0158 21188B00 		addu	$3,$4,$11
 229 015c 00006290 		lbu	$2,0($3)
 230 0160 08004230 		andi	$2,$2,0x8
  38:/mnt/hgfs/boot/booter/source/ata.c **** 
  39:/mnt/hgfs/boot/booter/source/ata.c ****     ata_wait_busy(&regs[reg_size*ATA_REG_STATUS]);
  40:/mnt/hgfs/boot/booter/source/ata.c **** 
  41:/mnt/hgfs/boot/booter/source/ata.c ****     int i = 0;
 231              		.loc 1 41 0
 232              		.loc 1 6 0
 233 0164 18004010 		beq	$2,$0,$L22
 234 0168 21400000 		move	$8,$0
 235              	
 236 016c 00320F00 		sll	$6,$15,8
 237 0170 1500C018 		blez	$6,$L22
 238 0174 00000000 		nop
GAS LISTING /tmp/ccpN3UVf.s 			page 6


 239              	
 240 0178 21380003 		move	$7,$24
 241 017c 21188000 		move	$3,$4
 242              	$L26:
  42:/mnt/hgfs/boot/booter/source/ata.c ****     while((regs[reg_size*ATA_REG_STATUS] & ATA_STATUS_DRQ) && i < ((SECTOR_SIZE/2)*n) )	// while DR
  43:/mnt/hgfs/boot/booter/source/ata.c ****     {
  44:/mnt/hgfs/boot/booter/source/ata.c **** 		buf[i++] = *((uint16*) &regs[reg_size*ATA_REG_DATA]);
 243              		.loc 1 44 0
 244 0180 00006295 		lhu	$2,0($11)
 245 0184 01000825 		addiu	$8,$8,1
 246              	$LBB9:
 247              		.loc 1 5 0
 248 0188 21186B00 		addu	$3,$3,$11
 249              	$LBE9:
 250              		.loc 1 44 0
 251 018c 0000E2A4 		sh	$2,0($7)
 252 0190 0200E724 		addiu	$7,$7,2
 253              	$L23:
 254              	$LBB10:
 255              	$LBB11:
 256              		.loc 1 6 0
 257 0194 00006290 		lbu	$2,0($3)
 258 0198 00160200 		sll	$2,$2,24
 259 019c 03160200 		sra	$2,$2,24
 260 01a0 FCFF4004 		bltz	$2,$L23
 261 01a4 00000000 		nop
 262              	
 263              	$LBE11:
 264              	$LBE10:
 265 01a8 21188B00 		addu	$3,$4,$11
 266 01ac 00006290 		lbu	$2,0($3)
 267 01b0 08004230 		andi	$2,$2,0x8
 268 01b4 04004010 		beq	$2,$0,$L22
 269 01b8 21188000 		move	$3,$4
 270              	
 271 01bc 2A100601 		slt	$2,$8,$6
 272 01c0 EFFF4014 		bne	$2,$0,$L26
 273 01c4 00000000 		nop
 274              	
 275              	$L22:
  45:/mnt/hgfs/boot/booter/source/ata.c **** 		ata_wait_busy(&regs[reg_size*ATA_REG_STATUS]);
  46:/mnt/hgfs/boot/booter/source/ata.c ****     }
  47:/mnt/hgfs/boot/booter/source/ata.c **** 
  48:/mnt/hgfs/boot/booter/source/ata.c ****     //ata_dump_sectors(buf, sect, n);
  49:/mnt/hgfs/boot/booter/source/ata.c **** 
  50:/mnt/hgfs/boot/booter/source/ata.c ****     return i*2;
  51:/mnt/hgfs/boot/booter/source/ata.c **** }
 276              		.loc 1 51 0
 277 01c8 0800E003 		j	$31
 278 01cc 40100800 		sll	$2,$8,1
 279              	
 280              	$L29:
 281              		.loc 1 35 0
 282 01d0 21104B00 		addu	$2,$2,$11
 283 01d4 4E000008 		j	$L28
 284 01d8 21000324 		li	$3,33
 285              	
GAS LISTING /tmp/ccpN3UVf.s 			page 7


 286              		.set	macro
 287              		.set	reorder
 288              	$LFE4:
 289              		.end	ata_read_sector
 290              		.align	2
 291              		.globl	ata_read_sectors
 292              		.ent	ata_read_sectors
 293              		.type	ata_read_sectors, @function
 294              	ata_read_sectors:
 295              	$LFB5:
  52:/mnt/hgfs/boot/booter/source/ata.c **** 
  53:/mnt/hgfs/boot/booter/source/ata.c **** int	ata_read_sectors(void* base, int sect, int n, short *buf, int reg_size)
  54:/mnt/hgfs/boot/booter/source/ata.c **** {
 296              		.loc 1 54 0
 297              		.frame	$sp,56,$31		# vars= 0, regs= 8/0, args= 24, gp= 0
 298              		.mask	0x807f0000,-4
 299              		.fmask	0x00000000,0
 300              		.set	noreorder
 301              		.set	nomacro
 302              		
 303 01dc C8FFBD27 		addiu	$sp,$sp,-56
 304              	$LCFI7:
 305 01e0 3000B6AF 		sw	$22,48($sp)
 306              	$LCFI8:
 307 01e4 2C00B5AF 		sw	$21,44($sp)
 308              	$LCFI9:
 309 01e8 2800B4AF 		sw	$20,40($sp)
 310              	$LCFI10:
 311 01ec 2400B3AF 		sw	$19,36($sp)
 312              	$LCFI11:
 313 01f0 2000B2AF 		sw	$18,32($sp)
 314              	$LCFI12:
 315 01f4 1C00B1AF 		sw	$17,28($sp)
 316              	$LCFI13:
 317 01f8 1800B0AF 		sw	$16,24($sp)
 318              	$LCFI14:
 319 01fc 3400BFAF 		sw	$31,52($sp)
 320              	$LCFI15:
 321              		.loc 1 54 0
 322 0200 21A0C000 		move	$20,$6
 323 0204 21B08000 		move	$22,$4
 324 0208 21A8A000 		move	$21,$5
 325 020c 2180E000 		move	$16,$7
 326 0210 4800B38F 		lw	$19,72($sp)
  55:/mnt/hgfs/boot/booter/source/ata.c **** 	int i, bytes_read = 0;;
 327              		.loc 1 55 0
 328 0214 21900000 		move	$18,$0
  56:/mnt/hgfs/boot/booter/source/ata.c **** 	for(i = 0; i < n; ++i)
 329              		.loc 1 56 0
 330 0218 0C00C018 		blez	$6,$L36
 331 021c 21880000 		move	$17,$0
 332              	
 333              	$L34:
  57:/mnt/hgfs/boot/booter/source/ata.c **** 	{
  58:/mnt/hgfs/boot/booter/source/ata.c **** 		bytes_read += ata_read_sector(base, sect + i, 1,  buf, reg_size);
 334              		.loc 1 58 0
 335 0220 2128B102 		addu	$5,$21,$17
GAS LISTING /tmp/ccpN3UVf.s 			page 8


 336 0224 21380002 		move	$7,$16
 337              		.loc 1 56 0
 338 0228 01003126 		addiu	$17,$17,1
 339              		.loc 1 58 0
 340 022c 2120C002 		move	$4,$22
 341 0230 01000624 		li	$6,1			# 0x1
 342 0234 0000000C 		jal	ata_read_sector