/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2003 Josef Baumgartner * Based on code from Bernhard Kuhn * * Copyright 2010-2012 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) */ #include #include #include #include #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_TEXT_BASE + \ CFG_SYS_INIT_RAM_ADDR) #define ASM_DRAMINIT_N (asm_dram_init - CONFIG_TEXT_BASE) #define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_TEXT_BASE + \ CFG_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_0F: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT /* Reserved */ vector10_17: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT vector18_1F: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT #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_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 #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 move.l #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- #endif #ifdef CONFIG_CF_SBF move.l #CFG_SYS_INIT_RAM_ADDR, %d0 movec %d0, %VBR move.l #(CFG_SYS_INIT_RAM_ADDR + CFG_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 #(CFG_SYS_ICACHE_INV + CFG_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 #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- #ifdef CFG_SYS_CS0_BASE /* Must disable global address */ move.l #0xFC008000, %a1 move.l #(CFG_SYS_CS0_BASE), (%a1) move.l #0xFC008008, %a1 move.l #(CFG_SYS_CS0_CTRL), (%a1) move.l #0xFC008004, %a1 move.l #(CFG_SYS_CS0_MASK), (%a1) #endif #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 #endif /* CONFIG_MCF5441x */ /* mandatory board level ddr-sdram init, * for both 5441x and 5445x */ bsr sbf_dram_init #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 /* 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 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 #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_SBFHDR_DATA_OFFSET), %a0 move.l #(CFG_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_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 #CONFIG_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 #ifdef CFG_SYS_CS0_BASE /* Must disable global address */ move.l #0xFC008000, %a1 move.l #(CFG_SYS_CS0_BASE), (%a1) move.l #0xFC008008, %a1 move.l #(CFG_SYS_CS0_CTRL), (%a1) move.l #0xFC008004, %a1 move.l #(CFG_SYS_CS0_MASK), (%a1) #endif /* 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 bsr 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 #(CONFIG_TEXT_BASE + 0xF80), %a2 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 bsr 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 #(CONFIG_TEXT_BASE + 0x400), %a0 jmp (%a0) #endif /* CONFIG_SYS_NAND_BOOT */ .globl asm_delay 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 #CFG_SYS_FLASH_BASE, %d0 movec %d0, %VBR move.l #(CFG_SYS_INIT_RAM_ADDR + CFG_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 #(CFG_SYS_ICACHE_INV + CFG_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 #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 #endif /* put relocation table address to a5 */ move.l #__got_start, %a5 /* setup stack initially on top of internal static ram */ move.l #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_RAM_SIZE), %sp /* * if configured, malloc_f arena will be reserved first, * then (and always) gd struct space will be reserved */ move.l %sp, -(%sp) move.l #board_init_f_alloc_reserve, %a1 jsr (%a1) /* update stack and frame-pointers */ move.l %d0, %sp move.l %sp, %fp /* initialize reserved area */ move.l %d0, -(%sp) move.l #board_init_f_init_reserve, %a1 jsr (%a1) /* run low-level CPU init code (from flash) */ move.l #cpu_init_f, %a1 jsr (%a1) /* run low-level board init code (from flash) */ clr.l %sp@- move.l #board_init_f, %a1 jsr (%a1) /* 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 #define R_68K_32 1 #define R_68K_RELATIVE 22 move.l #(__rel_dyn_start), %a1 move.l #(__rel_dyn_end), %a2 fixloop: move.l (%a1)+, %d1 /* Elf32_Rela r_offset */ move.l (%a1)+, %d2 /* Elf32_Rela r_info */ move.l (%a1)+, %d3 /* Elf32_Rela r_addend */ andi.l #0xff, %d2 cmp.l #R_68K_32, %d2 beq.s fixup cmp.l #R_68K_RELATIVE, %d2 beq.s fixup bra fixnext fixup: /* relative fix: store addend plus offset at dest location */ move.l %a0, %a3 add.l %d1, %a3 sub.l #CONFIG_SYS_MONITOR_BASE, %a3 move.l (%a3), %d4 add.l %a0, %d4 sub.l #CONFIG_SYS_MONITOR_BASE, %d4 move.l %d4, (%a3) fixnext: cmp.l %a1, %a2 bge.s fixloop /* * 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 #(_sbss), %a1 move.l #(_ebss), %d1 6: clr.l (%a1)+ cmp.l %a1,%d1 bgt.s 6b /* * fix got table in RAM */ move.l #(__got_start), %a5 /* fix got pointer register a5 */ /* calculate relative jump to board_init_r in ram */ move.l #(board_init_r), %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 /******************************************************************************/ .align 4