/* * Copyright (C) 2003 Josef Baumgartner * Based on code from Bernhard Kuhn * * Copyright 2010-2012 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include #include #include "version.h" #include #ifndef CONFIG_IDENT_STRING #define CONFIG_IDENT_STRING "" #endif #define _START _start #define _FAULT _fault #define SAVE_ALL \ move.w #0x2700,%sr; /* disable intrs */ \ subl #60,%sp; /* space for 15 regs */ \ moveml %d0-%d7/%a0-%a6,%sp@; #define RESTORE_ALL \ moveml %sp@,%d0-%d7/%a0-%a6; \ addl #60,%sp; /* space for 15 regs */ \ rte; #if defined(CONFIG_SERIAL_BOOT) #define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) #define ASM_DRAMINIT_N (asm_dram_init - TEXT_BASE) #define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) #endif .text /* * Vector table. This is used for initial platform startup. * These vectors are to catch any un-intended traps. */ _vectors: #if defined(CONFIG_SERIAL_BOOT) INITSP: .long 0 /* Initial SP */ #ifdef CONFIG_CF_SBF INITPC: .long ASM_DRAMINIT /* Initial PC */ #endif #ifdef CONFIG_SYS_NAND_BOOT INITPC: .long ASM_DRAMINIT_N /* Initial PC */ #endif #else INITSP: .long 0 /* Initial SP */ INITPC: .long _START /* Initial PC */ #endif vector02: .long _FAULT /* Access Error */ vector03: .long _FAULT /* Address Error */ vector04: .long _FAULT /* Illegal Instruction */ vector05: .long _FAULT /* Reserved */ vector06: .long _FAULT /* Reserved */ vector07: .long _FAULT /* Reserved */ vector08: .long _FAULT /* Privilege Violation */ vector09: .long _FAULT /* Trace */ vector0A: .long _FAULT /* Unimplemented A-Line */ vector0B: .long _FAULT /* Unimplemented F-Line */ vector0C: .long _FAULT /* Debug Interrupt */ vector0D: .long _FAULT /* Reserved */ vector0E: .long _FAULT /* Format Error */ vector0F: .long _FAULT /* Unitialized Int. */ /* Reserved */ vector10_17: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT vector18: .long _FAULT /* Spurious Interrupt */ vector19: .long _FAULT /* Autovector Level 1 */ vector1A: .long _FAULT /* Autovector Level 2 */ vector1B: .long _FAULT /* Autovector Level 3 */ vector1C: .long _FAULT /* Autovector Level 4 */ vector1D: .long _FAULT /* Autovector Level 5 */ vector1E: .long _FAULT /* Autovector Level 6 */ vector1F: .long _FAULT /* Autovector Level 7 */ #if !defined(CONFIG_SERIAL_BOOT) /* TRAP #0 - #15 */ vector20_2F: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT /* Reserved */ vector30_3F: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT vector64_127: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT vector128_191: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT vector192_255: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT #endif #if defined(CONFIG_SERIAL_BOOT) /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */ asm_sbf_img_hdr: .long 0x00000000 /* checksum, not yet implemented */ .long 0x00040000 /* image length */ .long CONFIG_SYS_TEXT_BASE /* image to be relocated at */ asm_dram_init: move.w #0x2700,%sr /* Mask off Interrupt */ #ifdef CONFIG_SYS_NAND_BOOT /* for assembly stack */ move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- #endif #ifdef CONFIG_CF_SBF move.l #CONFIG_SYS_INIT_RAM_ADDR, %d0 movec %d0, %VBR move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 /* initialize general use internal ram */ move.l #0, %d0 move.l #(ICACHE_STATUS), %a1 /* icache */ move.l #(DCACHE_STATUS), %a2 /* dcache */ move.l %d0, (%a1) move.l %d0, (%a2) /* invalidate and disable cache */ move.l #(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0 movec %d0, %CACR /* Invalidate cache */ move.l #0, %d0 movec %d0, %ACR0 movec %d0, %ACR1 movec %d0, %ACR2 movec %d0, %ACR3 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- /* Must disable global address */ move.l #0xFC008000, %a1 move.l #(CONFIG_SYS_CS0_BASE), (%a1) move.l #0xFC008008, %a1 move.l #(CONFIG_SYS_CS0_CTRL), (%a1) move.l #0xFC008004, %a1 move.l #(CONFIG_SYS_CS0_MASK), (%a1) #endif /* CONFIG_CF_SBF */ #ifdef CONFIG_MCF5441x /* TC: enable all peripherals, in the future only enable certain peripherals */ move.l #0xFC04002D, %a1 #if defined(CONFIG_CF_SBF) move.b #23, (%a1) /* dspi */ #endif move.b #46, (%a1) /* DDR */ /* slew settings */ move.l #0xEC094060, %a1 move.b #0, (%a1) /* use vco instead of cpu*2 clock for ddr clock */ move.l #0xEC09001A, %a1 move.w #0xE01D, (%a1) /* DDR settings */ move.l #0xFC0B8180, %a1 move.l #0x00000000, (%a1) move.l #0x40000000, (%a1) move.l #0xFC0B81AC, %a1 move.l #0x01030203, (%a1) move.l #0xFC0B8000, %a1 move.l #0x01010101, (%a1)+ /* 0x00 */ move.l #0x00000101, (%a1)+ /* 0x04 */ move.l #0x01010100, (%a1)+ /* 0x08 */ move.l #0x01010000, (%a1)+ /* 0x0C */ move.l #0x00010101, (%a1)+ /* 0x10 */ move.l #0xFC0B8018, %a1 move.l #0x00010100, (%a1)+ /* 0x18 */ move.l #0x00000001, (%a1)+ /* 0x1C */ move.l #0x01000001, (%a1)+ /* 0x20 */ move.l #0x00000100, (%a1)+ /* 0x24 */ move.l #0x00010001, (%a1)+ /* 0x28 */ move.l #0x00000200, (%a1)+ /* 0x2C */ move.l #0x01000002, (%a1)+ /* 0x30 */ move.l #0x00000000, (%a1)+ /* 0x34 */ move.l #0x00000100, (%a1)+ /* 0x38 */ move.l #0x02000100, (%a1)+ /* 0x3C */ move.l #0x02000407, (%a1)+ /* 0x40 */ move.l #0x02030007, (%a1)+ /* 0x44 */ move.l #0x02000100, (%a1)+ /* 0x48 */ move.l #0x0A030203, (%a1)+ /* 0x4C */ move.l #0x00020708, (%a1)+ /* 0x50 */ move.l #0x00050008, (%a1)+ /* 0x54 */ move.l #0x04030002, (%a1)+ /* 0x58 */ move.l #0x00000004, (%a1)+ /* 0x5C */ move.l #0x020A0000, (%a1)+ /* 0x60 */ move.l #0x0C00000E, (%a1)+ /* 0x64 */ move.l #0x00002004, (%a1)+ /* 0x68 */ move.l #0x00000000, (%a1)+ /* 0x6C */ move.l #0x00100010, (%a1)+ /* 0x70 */ move.l #0x00100010, (%a1)+ /* 0x74 */ move.l #0x00000000, (%a1)+ /* 0x78 */ move.l #0x07990000, (%a1)+ /* 0x7C */ move.l #0xFC0B80A0, %a1 move.l #0x00000000, (%a1)+ /* 0xA0 */ move.l #0x00C80064, (%a1)+ /* 0xA4 */ move.l #0x44520002, (%a1)+ /* 0xA8 */ move.l #0x00C80023, (%a1)+ /* 0xAC */ move.l #0xFC0B80B4, %a1 move.l #0x0000C350, (%a1) /* 0xB4 */ move.l #0xFC0B80E0, %a1 move.l #0x04000000, (%a1)+ /* 0xE0 */ move.l #0x03000304, (%a1)+ /* 0xE4 */ move.l #0x40040000, (%a1)+ /* 0xE8 */ move.l #0xC0004004, (%a1)+ /* 0xEC */ move.l #0x0642C000, (%a1)+ /* 0xF0 */ move.l #0x00000642, (%a1)+ /* 0xF4 */ move.l #0xFC0B8024, %a1 tpf move.l #0x01000100, (%a1) /* 0x24 */ move.l #0x2000, %d1 jsr asm_delay #endif /* CONFIG_MCF5441x */ #ifdef CONFIG_MCF5445x /* Dram Initialization a1, a2, and d0 */ /* mscr sdram */ move.l #0xFC0A4074, %a1 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1) nop /* SDRAM Chip 0 and 1 */ move.l #0xFC0B8110, %a1 move.l #0xFC0B8114, %a2 /* calculate the size */ move.l #0x13, %d1 move.l #(CONFIG_SYS_SDRAM_SIZE), %d2 #ifdef CONFIG_SYS_SDRAM_BASE1 lsr.l #1, %d2 #endif dramsz_loop: lsr.l #1, %d2 add.l #1, %d1 cmp.l #1, %d2 bne dramsz_loop #ifdef CONFIG_SYS_NAND_BOOT beq asm_nand_chk_status #endif /* SDRAM Chip 0 and 1 */ move.l #(CONFIG_SYS_SDRAM_BASE), (%a1) or.l %d1, (%a1) #ifdef CONFIG_SYS_SDRAM_BASE1 move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2) or.l %d1, (%a2) #endif nop /* dram cfg1 and cfg2 */ move.l #0xFC0B8008, %a1 move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1) nop move.l #0xFC0B800C, %a2 move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2) nop move.l #0xFC0B8000, %a1 /* Mode */ move.l #0xFC0B8004, %a2 /* Ctrl */ /* Issue PALL */ move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) nop #ifdef CONFIG_M54455EVB /* Issue LEMR */ move.l #(CONFIG_SYS_SDRAM_EMOD + 0x408), (%a1) nop move.l #(CONFIG_SYS_SDRAM_MODE + 0x300), (%a1) nop #endif move.l #1000, %d1 jsr asm_delay /* Issue PALL */ move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) nop /* Perform two refresh cycles */ move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0 nop move.l %d0, (%a2) move.l %d0, (%a2) nop #ifdef CONFIG_M54455EVB move.l #(CONFIG_SYS_SDRAM_MODE + 0x200), (%a1) nop #elif defined(CONFIG_M54451EVB) /* Issue LEMR */ move.l #(CONFIG_SYS_SDRAM_MODE), (%a1) nop move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1) #endif move.l #500, %d1 jsr asm_delay move.l #(CONFIG_SYS_SDRAM_CTRL), %d1 and.l #0x7FFFFFFF, %d1 #ifdef CONFIG_M54455EVB or.l #0x10000C00, %d1 #elif defined(CONFIG_M54451EVB) or.l #0x10000C00, %d1 #endif move.l %d1, (%a2) nop move.l #2000, %d1 jsr asm_delay #endif /* CONFIG_MCF5445x */ #ifdef CONFIG_CF_SBF /* * DSPI Initialization * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h * a1 - dspi status * a2 - dtfr * a3 - drfr * a4 - Dst addr */ /* Enable pins for DSPI mode - chip-selects are enabled later */ asm_dspi_init: #ifdef CONFIG_MCF5441x move.l #0xEC09404E, %a1 move.l #0xEC09404F, %a2 move.b #0xFF, (%a1) move.b #0x80, (%a2) #endif #ifdef CONFIG_MCF5445x move.l #0xFC0A4063, %a0 move.b #0x7F, (%a0) #endif /* Configure DSPI module */ move.l #0xFC05C000, %a0 move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */ move.l #0xFC05C00C, %a0 #ifdef CONFIG_MCF5441x move.l #0x3E000016, (%a0) #endif #ifdef CONFIG_MCF5445x move.l #0x3E000011, (%a0) #endif move.l #0xFC05C034, %a2 /* dtfr */ move.l #0xFC05C03B, %a3 /* drfr */ move.l #(ASM_SBF_IMG_HDR + 4), %a1 move.l (%a1)+, %d5 move.l (%a1), %a4 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0 move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4 move.l #0xFC05C02C, %a1 /* dspi status */ /* Issue commands and address */ move.l #0x8002000B, %d2 /* Fast Read Cmd */ jsr asm_dspi_wr_status jsr asm_dspi_rd_status move.l #0x80020000, %d2 /* Address byte 2 */ jsr asm_dspi_wr_status jsr asm_dspi_rd_status move.l #0x80020000, %d2 /* Address byte 1 */ jsr asm_dspi_wr_status jsr asm_dspi_rd_status move.l #0x80020000, %d2 /* Address byte 0 */ jsr asm_dspi_wr_status jsr asm_dspi_rd_status move.l #0x80020000, %d2 /* Dummy Wr and Rd */ jsr asm_dspi_wr_status jsr asm_dspi_rd_status /* Transfer serial boot header to sram */ asm_dspi_rd_loop1: move.l #0x80020000, %d2 jsr asm_dspi_wr_status jsr asm_dspi_rd_status move.b %d1, (%a0) /* read, copy to dst */ add.l #1, %a0 /* inc dst by 1 */ sub.l #1, %d4 /* dec cnt by 1 */ bne asm_dspi_rd_loop1 /* Transfer u-boot from serial flash to memory */ asm_dspi_rd_loop2: move.l #0x80020000, %d2 jsr asm_dspi_wr_status jsr asm_dspi_rd_status move.b %d1, (%a4) /* read, copy to dst */ add.l #1, %a4 /* inc dst by 1 */ sub.l #1, %d5 /* dec cnt by 1 */ bne asm_dspi_rd_loop2 move.l #0x00020000, %d2 /* Terminate */ jsr asm_dspi_wr_status jsr asm_dspi_rd_status /* jump to memory and execute */ move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0 jmp (%a0) asm_dspi_wr_status: move.l (%a1), %d0 /* status */ and.l #0x0000F000, %d0 cmp.l #0x00003000, %d0 bgt asm_dspi_wr_status move.l %d2, (%a2) rts asm_dspi_rd_status: move.l (%a1), %d0 /* status */ and.l #0x000000F0, %d0 lsr.l #4, %d0 cmp.l #0, %d0 beq asm_dspi_rd_status move.b (%a3), %d1 rts #endif /* CONFIG_CF_SBF */ #ifdef CONFIG_SYS_NAND_BOOT /* copy 4 boot pages to dram as soon as possible */ /* each page is 996 bytes (1056 total with 60 ECC bytes */ move.l #0x00000000, %a1 /* src */ move.l #TEXT_BASE, %a2 /* dst */ move.l #0x3E0, %d0 /* sz in long */ asm_boot_nand_copy: move.l (%a1)+, (%a2)+ subq.l #1, %d0 bne asm_boot_nand_copy /* jump to memory and execute */ move.l #(asm_nand_init), %a0 jmp (%a0) asm_nand_init: /* exit nand boot-mode */ move.l #0xFC0FFF30, %a1 or.l #0x00000040, %d1 move.l %d1, (%a1) /* initialize general use internal ram */ move.l #0, %d0 move.l #(CACR_STATUS), %a1 /* CACR */ move.l #(ICACHE_STATUS), %a2 /* icache */ move.l #(DCACHE_STATUS), %a3 /* dcache */ move.l %d0, (%a1) move.l %d0, (%a2) move.l %d0, (%a3) /* invalidate and disable cache */ move.l #0x01004100, %d0 /* Invalidate cache cmd */ movec %d0, %CACR /* Invalidate cache */ move.l #0, %d0 movec %d0, %ACR0 movec %d0, %ACR1 movec %d0, %ACR2 movec %d0, %ACR3 /* Must disable global address */ move.l #0xFC008000, %a1 move.l #(CONFIG_SYS_CS0_BASE), (%a1) move.l #0xFC008008, %a1 move.l #(CONFIG_SYS_CS0_CTRL), (%a1) move.l #0xFC008004, %a1 move.l #(CONFIG_SYS_CS0_MASK), (%a1) /* NAND port configuration */ move.l #0xEC094048, %a1 move.b #0xFD, (%a1)+ move.b #0x5F, (%a1)+ move.b #0x04, (%a1)+ /* reset nand */ move.l #0xFC0FFF38, %a1 /* isr */ move.l #0x000e0000, (%a1) move.l #0xFC0FFF08, %a2 move.l #0x00000000, (%a2)+ /* car */ move.l #0x11000000, (%a2)+ /* rar */ move.l #0x00000000, (%a2)+ /* rpt */ move.l #0x00000000, (%a2)+ /* rai */ move.l #0xFC0FFF2c, %a2 /* cfg */ move.l #0x00000000, (%a2)+ /* secsz */ move.l #0x000e0681, (%a2)+ move.l #0xFC0FFF04, %a2 /* cmd2 */ move.l #0xFF404001, (%a2) move.l #0x000e0000, (%a1) move.l #0x2000, %d1 jsr asm_delay /* setup nand */ move.l #0xFC0FFF00, %a1 move.l #0x30700000, (%a1)+ /* cmd1 */ move.l #0x007EF000, (%a1)+ /* cmd2 */ move.l #0xFC0FFF2C, %a1 move.l #0x00000841, (%a1)+ /* secsz */ move.l #0x000e0681, (%a1)+ /* cfg */ move.l #100, %d4 /* 100 pages ~200KB */ move.l #4, %d2 /* start at 4 */ move.l #0xFC0FFF04, %a0 /* cmd2 */ move.l #0xFC0FFF0C, %a1 /* rar */ move.l #(TEXT_BASE + 0xF80), %a2 /* dst */ asm_nand_read: move.l #0x11000000, %d0 /* rar */ or.l %d2, %d0 move.l %d0, (%a1) add.l #1, %d2 move.l (%a0), %d0 /* cmd2 */ or.l #1, %d0 move.l %d0, (%a0) move.l #0x200, %d1 jsr asm_delay asm_nand_chk_status: move.l #0xFC0FFF38, %a4 /* isr */ move.l (%a4), %d0 and.l #0x40000000, %d0 tst.l %d0 beq asm_nand_chk_status move.l #0xFC0FFF38, %a4 /* isr */ move.l (%a4), %d0 or.l #0x000E0000, %d0 move.l %d0, (%a4) move.l #0x200, %d3 move.l #0xFC0FC000, %a3 /* buf 1 */ asm_nand_copy: move.l (%a3)+, (%a2)+ subq.l #1, %d3 bgt asm_nand_copy subq.l #1, %d4 bgt asm_nand_read /* jump to memory and execute */ move.l #(TEXT_BASE + 0x400), %a0 jmp (%a0) #endif /* CONFIG_SYS_NAND_BOOT */ asm_delay: nop subq.l #1, %d1 bne asm_delay rts #endif /* CONFIG_CF_SBF || CONFIG_NAND_U_BOOT */ .text . = 0x400 .globl _start _start: #if !defined(CONFIG_SERIAL_BOOT) nop nop move.w #0x2700,%sr /* Mask off Interrupt */ /* Set vector base register at the beginning of the Flash */ move.l #CONFIG_SYS_FLASH_BASE, %d0 movec %d0, %VBR move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 /* initialize general use internal ram */ move.l #0, %d0 move.l #(ICACHE_STATUS), %a1 /* icache */ move.l #(DCACHE_STATUS), %a2 /* dcache */ move.l %d0, (%a1) move.l %d0, (%a2) /* invalidate and disable cache */ move.l #(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0 movec %d0, %CACR /* Invalidate cache */ move.l #0, %d0 movec %d0, %ACR0 movec %d0, %ACR1 movec %d0, %ACR2 movec %d0, %ACR3 #else move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 #endif /* set stackpointer to end of internal ram to get some stackspace for the first c-code */ move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- move.l #__got_start, %a5 /* put relocation table address to a5 */ bsr cpu_init_f /* run low-level CPU init code (from flash) */ bsr board_init_f /* run low-level board init code (from flash) */ /* board_init_f() does not return */ /*------------------------------------------------------------------------------*/ /* * void relocate_code (addr_sp, gd, addr_moni) * * This "function" does not return, instead it continues in RAM * after relocating the monitor code. * * r3 = dest * r4 = src * r5 = length in bytes * r6 = cachelinesize */ .globl relocate_code relocate_code: link.w %a6,#0 move.l 8(%a6), %sp /* set new stack pointer */ move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ move.l 16(%a6), %a0 /* Save copy of Destination Address */ move.l #CONFIG_SYS_MONITOR_BASE, %a1 move.l #__init_end, %a2 move.l %a0, %a3 /* copy the code to RAM */ 1: move.l (%a1)+, (%a3)+ cmp.l %a1,%a2 bgt.s 1b /* * We are done. Do not return, instead branch to second part of board * initialization, now running from RAM. */ move.l %a0, %a1 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 jmp (%a1) in_ram: clear_bss: /* * Now clear BSS segment */ move.l %a0, %a1 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 move.l %a0, %d1 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 6: clr.l (%a1)+ cmp.l %a1,%d1 bgt.s 6b /* * fix got table in RAM */ move.l %a0, %a1 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 move.l %a1,%a5 /* * fix got pointer register a5 */ move.l %a0, %a2 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 7: move.l (%a1),%d1 sub.l #_start,%d1 add.l %a0,%d1 move.l %d1,(%a1)+ cmp.l %a2, %a1 bne 7b /* calculate relative jump to board_init_r in ram */ move.l %a0, %a1 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 /* set parameters for board_init_r */ move.l %a0,-(%sp) /* dest_addr */ move.l %d0,-(%sp) /* gd */ jsr (%a1) /*------------------------------------------------------------------------------*/ /* exception code */ .globl _fault _fault: bra _fault .globl _exc_handler _exc_handler: SAVE_ALL movel %sp,%sp@- bsr exc_handler addql #4,%sp RESTORE_ALL .globl _int_handler _int_handler: SAVE_ALL movel %sp,%sp@- bsr int_handler addql #4,%sp RESTORE_ALL /*------------------------------------------------------------------------------*/ .globl version_string version_string: .ascii U_BOOT_VERSION_STRING, "\0" .align 4