From 3c8e76f679158d2a5cb1a16a7da1c4f48066ddfc Mon Sep 17 00:00:00 2001 From: TitanMKD Date: Sun, 10 Jun 2012 11:44:36 +0200 Subject: [PATCH] Added ROM to RAM code copy & exec with example of how to use it (miniblink_rom_to_ram). --- .../jellybean-lpc4330_rom_to_ram.ld | 35 +++++++ .../miniblink_rom_to_ram/Makefile | 24 +++++ .../miniblink_rom_to_ram/README | 12 +++ .../miniblink_rom_to_ram/miniblink.c | 82 ++++++++++++++++ lib/lpc43xx/libopencm3_lpc43xx.ld | 4 + lib/lpc43xx/libopencm3_lpc43xx_rom_to_ram.ld | 97 +++++++++++++++++++ lib/lpc43xx/vector.c | 19 ++++ 7 files changed, 273 insertions(+) create mode 100644 examples/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld create mode 100644 examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/Makefile create mode 100644 examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/README create mode 100644 examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/miniblink.c create mode 100644 lib/lpc43xx/libopencm3_lpc43xx_rom_to_ram.ld diff --git a/examples/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld b/examples/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld new file mode 100644 index 00000000..385b081e --- /dev/null +++ b/examples/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld @@ -0,0 +1,35 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Uwe Hermann + * Copyright (C) 2012 Benjamin Vernoux + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +/* Linker script for HackRF Jellybean (LPC4330, 1M SPI flash, 264K SRAM). */ + +/* Define memory regions. */ +MEMORY +{ + /* Physical address in Flash used to copy Code from Flash to RAM */ + rom_flash (rx) : ORIGIN = 0x80000000, LENGTH = 1M + /* rom is really the shadow region that points to SPI flash or elsewhere */ + rom (rx) : ORIGIN = 0x00000000, LENGTH = 1M + ram (rwx) : ORIGIN = 0x10000000, LENGTH = 128K + /* there are some additional RAM regions */ +} + +/* Include the common ld script. */ +INCLUDE libopencm3_lpc43xx_rom_to_ram.ld diff --git a/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/Makefile b/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/Makefile new file mode 100644 index 00000000..56cb540e --- /dev/null +++ b/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/Makefile @@ -0,0 +1,24 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2010 Uwe Hermann +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +BINARY = miniblink + +LDSCRIPT = ../jellybean-lpc4330_rom_to_ram.ld + +include ../../Makefile.include diff --git a/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/README b/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/README new file mode 100644 index 00000000..02960fa0 --- /dev/null +++ b/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/README @@ -0,0 +1,12 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is the smallest-possible example program using libopencm3. + +It's intended for the Jellybean development board from the HackRF project: + +https://github.com/mossmann/hackrf + +It should blink LED1 on the board. +This example copy the Code from ROM to RAM and execute code from RAM. diff --git a/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/miniblink.c b/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/miniblink.c new file mode 100644 index 00000000..3b3919b5 --- /dev/null +++ b/examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/miniblink.c @@ -0,0 +1,82 @@ +/* +* This file is part of the libopencm3 project. +* +* Copyright (C) 2010 Uwe Hermann +* Copyright (C) 2012 Michael Ossmann +* +* This library is free software: you can redistribute it and/or modify +* it under the terms of the GNU Lesser General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* This library 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 Lesser General Public License for more details. +* +* You should have received a copy of the GNU Lesser General Public License +* along with this library. If not, see . +*/ + +#include +#include + +#include "../jellybean_conf.h" + +void gpio_setup(void) +{ + /* Configure SCU Pin Mux as GPIO */ + scu_pinmux(SCU_PINMUX_LED1, SCU_GPIO_FAST); + scu_pinmux(SCU_PINMUX_LED2, SCU_GPIO_FAST); + scu_pinmux(SCU_PINMUX_LED3, SCU_GPIO_FAST); + + scu_pinmux(SCU_PINMUX_EN1V8, SCU_GPIO_FAST); + + scu_pinmux(SCU_PINMUX_BOOT0, SCU_GPIO_FAST); + scu_pinmux(SCU_PINMUX_BOOT1, SCU_GPIO_FAST); + scu_pinmux(SCU_PINMUX_BOOT2, SCU_GPIO_FAST); + scu_pinmux(SCU_PINMUX_BOOT3, SCU_GPIO_FAST); + + /* Configure all GPIO as Input (safe state) */ + GPIO0_DIR = 0; + GPIO1_DIR = 0; + GPIO2_DIR = 0; + GPIO3_DIR = 0; + GPIO4_DIR = 0; + GPIO5_DIR = 0; + GPIO6_DIR = 0; + GPIO7_DIR = 0; + + /* Configure GPIO as Output */ + GPIO2_DIR |= (PIN_LED1|PIN_LED2|PIN_LED3); /* Configure GPIO2[1/2/8] (P4_1/2 P6_12) as output. */ + GPIO3_DIR |= PIN_EN1V8; /* GPIO3[6] on P6_10 as output. */ +} + +u32 boot0, boot1, boot2, boot3; + +int main(void) +{ + int i; + gpio_setup(); + + /* Set 1V8 */ + gpio_set(PORT_EN1V8, PIN_EN1V8); + + /* Blink LED1/2/3 on the board and Read BOOT0/1/2/3 pins. */ + while (1) + { + boot0 = BOOT0_STATE; + boot1 = BOOT1_STATE; + boot2 = BOOT2_STATE; + boot3 = BOOT3_STATE; + + gpio_set(PORT_LED1_3, (PIN_LED1|PIN_LED2|PIN_LED3)); /* LEDs on */ + for (i = 0; i < 2000000; i++) /* Wait a bit. */ + __asm__("nop"); + gpio_clear(PORT_LED1_3, (PIN_LED1|PIN_LED2|PIN_LED3)); /* LED off */ + for (i = 0; i < 2000000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + return 0; +} diff --git a/lib/lpc43xx/libopencm3_lpc43xx.ld b/lib/lpc43xx/libopencm3_lpc43xx.ld index 5c3221b1..47b403b0 100644 --- a/lib/lpc43xx/libopencm3_lpc43xx.ld +++ b/lib/lpc43xx/libopencm3_lpc43xx.ld @@ -3,6 +3,7 @@ * * Copyright (C) 2009 Uwe Hermann * Copyright (C) 2012 Michael Ossmann + * Copyright (C) 2012 Benjamin Vernoux * * This library is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by @@ -35,6 +36,7 @@ SECTIONS .text : { . = ALIGN(0x400); + _text_ram = 0; /* Start of Code in RAM NULL because Copy of Code from ROM to RAM disabled */ *(.vectors) /* Vector table */ *(.text*) /* Program code */ . = ALIGN(4); @@ -50,6 +52,8 @@ SECTIONS __exidx_end = .; _etext = .; + _etext_ram = 0; /* Start of Code in RAM NULL because Copy of Code from ROM to RAM disabled */ + _etext_rom = 0; /* Start of Code in RAM NULL because Copy of Code from ROM to RAM disabled */ . = ORIGIN(ram); diff --git a/lib/lpc43xx/libopencm3_lpc43xx_rom_to_ram.ld b/lib/lpc43xx/libopencm3_lpc43xx_rom_to_ram.ld new file mode 100644 index 00000000..f833aafb --- /dev/null +++ b/lib/lpc43xx/libopencm3_lpc43xx_rom_to_ram.ld @@ -0,0 +1,97 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2012 Michael Ossmann + * Copyright (C) 2012 Benjamin Vernoux + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +/* Generic linker script for LPC43XX targets using libopencm3. */ + +/* Memory regions must be defined in the ld script which includes this one. */ + +/* Enforce emmition of the vector table. */ +EXTERN (vector_table) + +/* Define the entry point of the output file. */ +ENTRY(reset_handler) + +/* Define sections. */ +SECTIONS +{ + . = ORIGIN(rom); + + .text : { + . = ALIGN(0x400); + _text_ram = . + ORIGIN(ram); /* Start of Code in RAM */ + + *(.vectors) /* Vector table */ + *(.text*) /* Program code */ + . = ALIGN(4); + *(.rodata*) /* Read-only data */ + . = ALIGN(4); + } >rom + + /* exception index - required due to libgcc.a issuing /0 exceptions */ + __exidx_start = .; + .ARM.exidx : { + *(.ARM.exidx*) + } > rom + __exidx_end = .; + + _etext = .; + _etext_ram = . + ORIGIN(ram); + _etext_rom = . + ORIGIN(rom_flash); + + . = ORIGIN(ram); + + .data : { + _data = .; + *(.data*) /* Read-write initialized data */ + . = ALIGN(4); + _edata = .; + } >ram AT >rom + + .bss : { + *(.bss*) /* Read-write zero initialized data */ + *(COMMON) + . = ALIGN(4); + _ebss = .; + } >ram + + /* exception unwind data - required due to libgcc.a issuing /0 exceptions */ + .ARM.extab : { + *(.ARM.extab*) + } >ram + + /* + * The .eh_frame section appears to be used for C++ exception handling. + * You may need to fix this if you're using C++. + */ + /DISCARD/ : { *(.eh_frame) } + + /* + * Another section used by C++ stuff, appears when using newlib with + * 64bit (long long) printf support - discard it for now. + */ + /DISCARD/ : { *(.ARM.exidx) } + + end = .; + + /* Leave room above stack for IAP to run. */ + __StackTop = ORIGIN(ram) + LENGTH(ram) - 32; + PROVIDE(_stack = __StackTop); +} diff --git a/lib/lpc43xx/vector.c b/lib/lpc43xx/vector.c index 33eee4ae..631e54e2 100644 --- a/lib/lpc43xx/vector.c +++ b/lib/lpc43xx/vector.c @@ -22,6 +22,7 @@ /* Symbols exported by the linker script(s). */ extern unsigned _etext, _data, _edata, _ebss, _stack; +extern unsigned _etext_ram, _text_ram, _etext_rom; void main(void); void reset_handler(void); @@ -158,11 +159,29 @@ void (*const vector_table[]) (void) = { qei_irqhandler, }; +#define MMIO32(addr) (*(volatile unsigned long*)(addr)) +#define CREG_M4MEMMAP MMIO32( (0x40043000 + 0x100) ) + void reset_handler(void) { volatile unsigned *src, *dest; __asm__("MSR msp, %0" : : "r"(&_stack)); + /* Copy the code from ROM to Real RAM (if enabled) */ + if( (&_etext_ram-&_text_ram) > 0 ) + { + src = &_etext_rom-(&_etext_ram-&_text_ram); + for(dest = &_text_ram; dest < &_etext_ram; ) + { + *dest++ = *src++; + } + + /* Change Shadow memory to Real RAM */ + CREG_M4MEMMAP = (unsigned long)&_text_ram; + + /* Continue Execution in RAM */ + } + for (src = &_etext, dest = &_data; dest < &_edata; src++, dest++) *dest = *src;