/* * sys.c - First pages for MKL27Z256. * * Copyright (C) 2016 Flying Stone Technology * Author: NIIBE Yutaka * * Copying and distribution of this file, with or without modification, * are permitted in any medium without royalty provided the copyright * notice and this notice are preserved. This file is offered as-is, * without any warranty. * * * First two pages of Flash ROM is difficult to use because of * predefined purposes. It's defined as a default vector page and * a flash configuration page. * * We put something useful to those two pages, together with the * data for predefined purposes. */ #include #include #include "board.h" #define ADDR_VECTORS (0x00000900) #define ADDR_SCR_VTOR 0xe000ed08 static void __attribute__ ((naked,section(".fixed_function.reset"))) reset (void) { uint32_t r3 = ADDR_SCR_VTOR; asm volatile ("str %2, [%0]\n\t" /* Set SCR->VTOR */ "ldr %0, [%2]\n\t" /* Stack address */ "msr MSP, %0\n\t" /* Exception handler stack. */ "ldr %0, [%2, #4]\n\t" /* The entry address */ "bx %0\n\t" /* Jump to the entry */ ".align 2" : "=r" (r3) : "0" (r3), "r" (ADDR_VECTORS) : "memory"); /* Never reach here. */ } static uint32_t stack_entry[] __attribute__ ((section(".first_page.first_words"),used)) = { /* Since MSP are soon modified in RESET, we put 0 here. */ 0, (uint32_t)reset, }; #include "mcu/clk_gpio_init-mkl27z.c" static void set_led (int on) { if (on) GPIOB->PCOR = (1 << 0); /* PTB0: Clear: Light on */ else GPIOB->PSOR = (1 << 0); /* PTB0: Set : Light off */ } /* * Here comes other SYS routines and data. */ const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = { 3*2+2, /* bLength */ 0x03, /* bDescriptorType = STRING_DESCRIPTOR */ /* sys version: "3.0" */ '3', 0, '.', 0, '0', 0, }; static const uint8_t board_name_string[] = BOARD_NAME; const uint8_t __attribute__((section(".sys.board_info"))) *const sys_board_name = board_name_string; const uint32_t __attribute__((section(".sys.board_info"))) sys_board_id = BOARD_ID; typedef void (*handler)(void); handler sys_vector[] __attribute__ ((section(".sys.vectors"))) = { clock_init, gpio_init, (handler)set_led, NULL, }; static uint32_t flash_config[] __attribute__ ((section(".flash_config"),used)) = { 0xffffffff, 0xffffffff, /* Comparison Key */ 0xffffffff, /* Protection bytes */ 0xffff3ffe, /* FSEC=0xfe, FOPT=0x3f */ /* FOPT=0x3f: * BOOTSRC_SEL=00: Boot from flash */ /* FSEC=0xfe: * unsecure */ }; /* * Flash memory routine */ struct FTFA { volatile uint8_t FSTAT; volatile uint8_t FCNFG; volatile uint8_t FSEC; volatile uint8_t FOPT; /* Note: addressing (3,2,1,0, 7,6,5,4, B,A,9,8) */ /* Use Bx macro. */ volatile uint8_t FCCO[12]; /* Note: addressing (3,2,1,0). Use Bx macro. */ volatile uint8_t FPROT[4]; }; static struct FTFA *const FTFA = (struct FTFA *)0x40020000; #define FSTAT_CCIF 0x80 #define B3 0 #define B2 1 #define B1 2 #define B0 3 #define B7 4 #define B6 5 #define B5 6 #define B4 7 #define BB 8 #define BA 9 #define B9 10 #define B8 11 uint32_t __attribute__ ((naked,section(".fixed_function.flash_do_internal"))) flash_do_internal (void) { #ifdef ORIGINAL_IN_C uint8_t r; asm volatile ("cpsid i" : : : "memory"); FTFA->FSTAT |= FSTAT_CCIF; while (((r = FTFA->FSTAT) & FSTAT_CCIF) == 0) ; r &= ~FSTAT_CCIF; asm volatile ("cpsie i" : : : "memory"); return (uint32_t)r; #else register unsigned int r0 asm ("r0"); register unsigned int r1 asm ("r1") = (unsigned int)FTFA; register unsigned int r2 asm ("r2") = FSTAT_CCIF; asm volatile ("cpsid i\n\t" "ldrb %0, [%1]\n\t" "orr %0, %2\n\t" "strb %0, [%1]\n" "0:\t" "ldrb %0, [%1]\n\t" "uxtb %0, %0\n\t" "tst %0, %2\n\t" "beq 0b\n\t" "cpsie i\n\t" "bic %0, %2\n\t" "bx lr" : "=r" (r0) : "r" (r1), "r" (r2) : "memory"); return r0; #endif } /* * Let execute flash command. * Since the code should be on RAM, we copy the code onto stack * and let it go. */ uint32_t __attribute__ ((naked,section(".fixed_function.flash_do"))) flash_do (void) { register unsigned int r0 asm ("r0"); register unsigned int r1 asm ("r1"); register unsigned int r2 asm ("r2"); register unsigned int r3 asm ("r3") = (unsigned int)flash_do_internal&~3; /* Address of Thumb code &1 == 1, so, we clear the last bits. ------^ */ asm volatile ("sub sp, #32\n\t" "mov %1, sp\n\t" "mov %2, #0\n" "0:\t" "cmp %2, #32\n\t" "beq 1f\n\t" "ldr %0, [%3, %2]\n\t" "str %0, [%1, %2]\n\t" "add %2, #4\n\t" "b 0b\n" "1:\t" "add %1, #1\n\t" /* Thumb code requires LSB=1. */ "mov %3, lr\n\t" "blx %1\n\t" "add sp, #32\n\t" "bx %3" : "=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) : "3" (r3)); } #define FLASH_COMMAND_PROGRAM_LONGWORD 0x06 #define FLASH_COMMAND_ERASE_FLASH_SECTOR 0x09 int __attribute__ ((naked,section(".fixed_function.flash_erase_page"))) flash_erase_page (uint32_t addr) { #ifdef ORIGINAL_IN_C FTFA->FCCO[B0] = FLASH_COMMAND_ERASE_FLASH_SECTOR; FTFA->FCCO[B3] = (addr >> 0) & 0xff; FTFA->FCCO[B2] = (addr >> 8) & 0xff; FTFA->FCCO[B1] = (addr >> 16) & 0xff; flash_do (); #else register unsigned int r0 asm ("r0") = addr; register unsigned int r1 asm ("r1"); register unsigned int r2 asm ("r2") = FLASH_COMMAND_ERASE_FLASH_SECTOR; register unsigned int r3 asm ("r3") = (unsigned int)FTFA; asm volatile ("strb %2, [%3, #7]\n\t" "strb %0, [%3, #4]\n\t" "lsr %0, #8\n\t" "strb %0, [%3, #5]\n\t" "lsr %0, #8\n\t" "strb %0, [%3, #6]\n\t" "b flash_do" : "=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) : "0" (r0), "2" (r2), "3" (r3)); #endif } int __attribute__ ((naked,section(".fixed_function.flash_program_word"))) flash_program_word (uint32_t addr, uint32_t word) { #ifdef ORIGINAL_IN_C FTFA->FCCO[B0] = FLASH_COMMAND_PROGRAM_LONGWORD; FTFA->FCCO[B3] = (addr >> 0) & 0xff; FTFA->FCCO[B2] = (addr >> 8) & 0xff; FTFA->FCCO[B1] = (addr >> 16) & 0xff; FTFA->FCCO[B4] = (word >> 0) & 0xff; FTFA->FCCO[B5] = (word >> 8) & 0xff; FTFA->FCCO[B6] = (word >> 16) & 0xff; FTFA->FCCO[B7] = (word >> 24) & 0xff; flash_do (); #else register unsigned int r0 asm ("r0") = addr; register unsigned int r1 asm ("r1") = word; register unsigned int r2 asm ("r2") = FLASH_COMMAND_PROGRAM_LONGWORD; register unsigned int r3 asm ("r3") = (unsigned int)FTFA; asm volatile ("strb %2, [%3, #7]\n\t" "strb %0, [%3, #4]\n\t" "lsr %0, #8\n\t" "strb %0, [%3, #5]\n\t" "lsr %0, #8\n\t" "strb %0, [%3, #6]\n\t" "strb %1, [%3, #11]\n\t" "lsr %1, #8\n\t" "strb %1, [%3, #10]\n\t" "lsr %1, #8\n\t" "strb %1, [%3, #9]\n\t" "lsr %1, #8\n\t" "strb %1, [%3, #8]\n\t" "b flash_do" : "=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) : "0" (r0), "1" (r1), "2" (r2), "3" (r3)); #endif } /* * CRC32 calculation routines. */ void __attribute__ ((naked,section(".fixed_function.crc32_init"))) crc32_init (unsigned int *p) { #ifdef ORIGINAL_IN_C *p = 0xffffffff; #else register unsigned int r3 asm ("r3"); asm volatile ("mov %0, #1\n\t" "neg %0, %0\n\t" "str %0, [%1]\n\t" "bx lr" : "=r" (r3) : "r" (p) : "memory"); #endif } #ifdef ORIGINAL_IN_C const unsigned int *const crc32_table= (const unsigned int *)0x00000500; #endif void __attribute__ ((naked,section(".fixed_function.crc32_u8"))) crc32_u8 (unsigned int *p, unsigned char v) { #ifdef ORIGINAL_IN_C *p = crc32_table[(*p & 0xff) ^ v] ^ (*p >> 8); #else register unsigned int r2 asm ("r2"); register unsigned int r3 asm ("r3"); asm volatile ("ldrb %2, [%4]\n\t" "eor %0, %2\n\t" "mov %2, #0xa0\n\t" /* (0x0500 >> 3) */ "lsl %0, %0, #2\n\t" "lsl %2, %2, #3\n\t" "add %0, %0, %2\n\t" "ldr %2, [%4]\n\t" "ldr %1, [%0]\n\t" "lsr %2, %2, #8\n\t" "eor %2, %1\n\t" "str %2, [%4]\n\t" "bx lr" : "=r" (v), "=r" (r2), "=r" (r3) : "0" (v), "r" (p) : "memory"); #endif } void __attribute__ ((naked,section(".fixed_function.crc32_u32"))) crc32_u32 (unsigned int *p, unsigned int u) { #ifdef ORIGINAL_IN_C crc32_u8 (p, u & 0xff); crc32_u8 (p, (u >> 8)& 0xff); crc32_u8 (p, (u >> 16)& 0xff); crc32_u8 (p, (u >> 24)& 0xff); #else register unsigned int r3 asm ("r3"); register unsigned int r4 asm ("r4"); register unsigned int r5 asm ("r5"); asm volatile ("push {%1, %2, %3, lr}\n\t" "mov %2, %0\n\t" "mov %3, %5\n\t" "uxtb %0, %0\n\t" "bl crc32_u8\n\t" "lsr %0, %2, #8\n\t" "mov %5, %3\n\t" "uxtb %0, %0\n\t" "bl crc32_u8\n\t" "lsr %0, %2, #16\n\t" "mov %5, %3\n\t" "uxtb %0, %0\n\t" "bl crc32_u8\n\t" "mov %5, %3\n\t" "lsr %0, %2, #24\n\t" "bl crc32_u8\n\t" "pop {%1, %2, %3, pc}" : "=r" (u), "=r" (r3), "=r" (r4), "=r" (r5) : "0" (u), "r" (p) : "memory"); #endif } /* * Table of CRC32, generated by gen_crc_table.py */ const unsigned int crc32_table[256] __attribute__ ((section(".crc32_table"))) = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, };