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