X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f7e3ed82874bfd8951c90536bd7185d599d6dbf8..refs/pull/493/head:/bootrom/bootrom.c?ds=sidebyside diff --git a/bootrom/bootrom.c b/bootrom/bootrom.c index 04bc14be..bbea07b5 100644 --- a/bootrom/bootrom.c +++ b/bootrom/bootrom.c @@ -1,4 +1,23 @@ +//----------------------------------------------------------------------------- +// This code is licensed to you under the terms of the GNU GPL, version 2 or, +// at your option, any later version. See the LICENSE.txt file for the text of +// the license. +//----------------------------------------------------------------------------- +// Main code for the bootloader +//----------------------------------------------------------------------------- + #include +#include "usb_cdc.h" +#include "cmd.h" +//#include "usb_hid.h" + +void DbpString(char *str) { + byte_t len = 0; + while (str[len] != 0x00) { + len++; + } + cmd_send(CMD_DEBUG_PRINT_STRING,len,0,0,(byte_t*)str,len); +} struct common_area common_area __attribute__((section(".commonarea"))); unsigned int start_addr, end_addr, bootrom_unlocked; @@ -21,21 +40,22 @@ static void ConfigClocks(void) (1<PMC_MOR = - PMC_MAIN_OSC_ENABLE | - PMC_MAIN_OSC_STARTUP_DELAY(0x50); + AT91C_CKGR_MOSCEN | + PMC_MAIN_OSC_STARTUP_DELAY(8); // wait for main oscillator to stabilize - while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_STABILIZED) ) + while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS) ) ; - // minimum PLL clock frequency is 80 MHz in range 00 (96 here so okay) - // frequency is crystal * multiplier / divisor = 16Mhz * 12 / 2 = 96Mhz + // PLL output clock frequency in range 80 - 160 MHz needs CKGR_PLL = 00 + // PLL output clock frequency in range 150 - 180 MHz needs CKGR_PLL = 10 + // PLL output is MAINCK * multiplier / divisor = 16Mhz * 12 / 2 = 96Mhz AT91C_BASE_PMC->PMC_PLLR = PMC_PLL_DIVISOR(2) | PMC_PLL_COUNT_BEFORE_LOCK(0x50) | @@ -44,132 +64,134 @@ static void ConfigClocks(void) PMC_PLL_USB_DIVISOR(1); // wait for PLL to lock - while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_PLL_LOCK) ) + while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK) ) ; // we want a master clock (MCK) to be PLL clock / 2 = 96Mhz / 2 = 48Mhz - // as per datasheet, this register must be programmed in two operations + // datasheet recommends that this register is programmed in two operations // when changing to PLL, program the prescaler first then the source - AT91C_BASE_PMC->PMC_MCKR = PMC_CLK_PRESCALE_DIV_2; + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; // wait for main clock ready signal - while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_MCK_READY) ) + while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) ) ; // set the source to PLL - AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | PMC_CLK_PRESCALE_DIV_2; + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2 | AT91C_PMC_CSS_PLL_CLK; // wait for main clock ready signal - while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_MCK_READY) ) + while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) ) ; } static void Fatal(void) { - for(;;); + for(;;); } -void UsbPacketReceived(uint8_t *packet, int len) -{ - int i, dont_ack=0; - UsbCommand *c = (UsbCommand *)packet; - volatile uint32_t *p; - - if(len != sizeof(*c)) { - Fatal(); - } - - switch(c->cmd) { - case CMD_DEVICE_INFO: - dont_ack = 1; - c->cmd = CMD_DEVICE_INFO; - c->arg[0] = DEVICE_INFO_FLAG_BOOTROM_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM | - DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH; - if(common_area.flags.osimage_present) c->arg[0] |= DEVICE_INFO_FLAG_OSIMAGE_PRESENT; - UsbSendPacket(packet, len); - break; - - case CMD_SETUP_WRITE: - /* The temporary write buffer of the embedded flash controller is mapped to the - * whole memory region, only the last 8 bits are decoded. - */ - p = (volatile uint32_t *)&_flash_start; - for(i = 0; i < 12; i++) { - p[i+c->arg[0]] = c->d.asDwords[i]; - } - break; - - case CMD_FINISH_WRITE: - p = (volatile uint32_t *)&_flash_start; - for(i = 0; i < 4; i++) { - p[i+60] = c->d.asDwords[i]; - } - - /* Check that the address that we are supposed to write to is within our allowed region */ - if( ((c->arg[0]+AT91C_IFLASH_PAGE_SIZE-1) >= end_addr) || (c->arg[0] < start_addr) ) { - /* Disallow write */ - dont_ack = 1; - c->cmd = CMD_NACK; - UsbSendPacket(packet, len); - } else { - /* Translate address to flash page and do flash, update here for the 512k part */ - AT91C_BASE_EFC0->EFC_FCR = MC_FLASH_COMMAND_KEY | - MC_FLASH_COMMAND_PAGEN((c->arg[0]-(int)&_flash_start)/AT91C_IFLASH_PAGE_SIZE) | - AT91C_MC_FCMD_START_PROG; - } - - uint32_t sr; - - while(!((sr = AT91C_BASE_EFC0->EFC_FSR) & MC_FLASH_STATUS_READY)) - ; - if(sr & (MC_FLASH_STATUS_LOCKE | MC_FLASH_STATUS_PROGE)) { - dont_ack = 1; - c->cmd = CMD_NACK; - UsbSendPacket(packet, len); - } - break; - - case CMD_HARDWARE_RESET: - USB_D_PLUS_PULLUP_OFF(); - AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST; - break; - - case CMD_START_FLASH: - if(c->arg[2] == START_FLASH_MAGIC) bootrom_unlocked = 1; - else bootrom_unlocked = 0; - { - int prot_start = (int)&_bootrom_start; - int prot_end = (int)&_bootrom_end; - int allow_start = (int)&_flash_start; - int allow_end = (int)&_flash_end; - int cmd_start = c->arg[0]; - int cmd_end = c->arg[1]; - - /* Only allow command if the bootrom is unlocked, or the parameters are outside of the protected - * bootrom area. In any case they must be within the flash area. - */ - if( (bootrom_unlocked || ((cmd_start >= prot_end) || (cmd_end < prot_start))) - && (cmd_start >= allow_start) && (cmd_end <= allow_end) ) { - start_addr = cmd_start; - end_addr = cmd_end; - } else { - start_addr = end_addr = 0; - dont_ack = 1; - c->cmd = CMD_NACK; - UsbSendPacket(packet, len); - } - } - break; - - default: - Fatal(); - break; - } - - if(!dont_ack) { - c->cmd = CMD_ACK; - UsbSendPacket(packet, len); - } +void UsbPacketReceived(uint8_t *packet, int len) { + int i, dont_ack=0; + UsbCommand* c = (UsbCommand *)packet; + volatile uint32_t *p; + + if(len != sizeof(UsbCommand)) { + Fatal(); + } + + uint32_t arg0 = (uint32_t)c->arg[0]; + + switch(c->cmd) { + case CMD_DEVICE_INFO: { + dont_ack = 1; + arg0 = DEVICE_INFO_FLAG_BOOTROM_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM | + DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH; + if(common_area.flags.osimage_present) { + arg0 |= DEVICE_INFO_FLAG_OSIMAGE_PRESENT; + } + cmd_send(CMD_DEVICE_INFO,arg0,1,2,0,0); + } break; + + case CMD_SETUP_WRITE: { + /* The temporary write buffer of the embedded flash controller is mapped to the + * whole memory region, only the last 8 bits are decoded. + */ + p = (volatile uint32_t *)&_flash_start; + for(i = 0; i < 12; i++) { + p[i+arg0] = c->d.asDwords[i]; + } + } break; + + case CMD_FINISH_WRITE: { + uint32_t* flash_mem = (uint32_t*)(&_flash_start); + for (size_t j=0; j<2; j++) { + for(i = 0+(64*j); i < 64+(64*j); i++) { + flash_mem[i] = c->d.asDwords[i]; + } + + uint32_t flash_address = arg0 + (0x100*j); + + /* Check that the address that we are supposed to write to is within our allowed region */ + if( ((flash_address+AT91C_IFLASH_PAGE_SIZE-1) >= end_addr) || (flash_address < start_addr) ) { + /* Disallow write */ + dont_ack = 1; + cmd_send(CMD_NACK,0,0,0,0,0); + } else { + uint32_t page_n = (flash_address - ((uint32_t)flash_mem)) / AT91C_IFLASH_PAGE_SIZE; + /* Translate address to flash page and do flash, update here for the 512k part */ + AT91C_BASE_EFC0->EFC_FCR = MC_FLASH_COMMAND_KEY | + MC_FLASH_COMMAND_PAGEN(page_n) | + AT91C_MC_FCMD_START_PROG; + } + + // Wait until flashing of page finishes + uint32_t sr; + while(!((sr = AT91C_BASE_EFC0->EFC_FSR) & AT91C_MC_FRDY)); + if(sr & (AT91C_MC_LOCKE | AT91C_MC_PROGE)) { + dont_ack = 1; + cmd_send(CMD_NACK,0,0,0,0,0); + } + } + } break; + + case CMD_HARDWARE_RESET: { + usb_disable(); + AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST; + } break; + + case CMD_START_FLASH: { + if(c->arg[2] == START_FLASH_MAGIC) bootrom_unlocked = 1; + else bootrom_unlocked = 0; + { + int prot_start = (int)&_bootrom_start; + int prot_end = (int)&_bootrom_end; + int allow_start = (int)&_flash_start; + int allow_end = (int)&_flash_end; + int cmd_start = c->arg[0]; + int cmd_end = c->arg[1]; + + /* Only allow command if the bootrom is unlocked, or the parameters are outside of the protected + * bootrom area. In any case they must be within the flash area. + */ + if( (bootrom_unlocked || ((cmd_start >= prot_end) || (cmd_end < prot_start))) + && (cmd_start >= allow_start) && (cmd_end <= allow_end) ) { + start_addr = cmd_start; + end_addr = cmd_end; + } else { + start_addr = end_addr = 0; + dont_ack = 1; + cmd_send(CMD_NACK,0,0,0,0,0); + } + } + } break; + + default: { + Fatal(); + } break; + } + + if(!dont_ack) { + cmd_send(CMD_ACK,arg0,0,0,0,0); + } } static void flash_mode(int externally_entered) @@ -177,16 +199,25 @@ static void flash_mode(int externally_entered) start_addr = 0; end_addr = 0; bootrom_unlocked = 0; + byte_t rx[sizeof(UsbCommand)]; + size_t rx_len; + + usb_enable(); + for (volatile size_t i=0; i<0x100000; i++) {}; - UsbStart(); for(;;) { WDT_HIT(); - UsbPoll(TRUE); + if (usb_poll()) { + rx_len = usb_read(rx,sizeof(UsbCommand)); + if (rx_len) { + UsbPacketReceived(rx,rx_len); + } + } if(!externally_entered && !BUTTON_PRESS()) { /* Perform a reset to leave flash mode */ - USB_D_PLUS_PULLUP_OFF(); + usb_disable(); LED_B_ON(); AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST; for(;;); @@ -198,7 +229,7 @@ static void flash_mode(int externally_entered) } } -extern char _osimage_entry; +extern uint32_t _osimage_entry; void BootROM(void) { //------------ @@ -242,25 +273,16 @@ void BootROM(void) GPIO_LED_C | GPIO_LED_D; - USB_D_PLUS_PULLUP_OFF(); +// USB_D_PLUS_PULLUP_OFF(); + usb_disable(); LED_D_OFF(); LED_C_ON(); LED_B_OFF(); LED_A_OFF(); - // if 512K FLASH part - TODO make some defines :) - if ((AT91C_BASE_DBGU->DBGU_CIDR | 0xf00) == 0xa00) { - AT91C_BASE_EFC0->EFC_FMR = - MC_FLASH_MODE_FLASH_WAIT_STATES(1) | - MC_FLASH_MODE_MASTER_CLK_IN_MHZ(0x48); - AT91C_BASE_EFC1->EFC_FMR = - MC_FLASH_MODE_FLASH_WAIT_STATES(1) | - MC_FLASH_MODE_MASTER_CLK_IN_MHZ(0x48); - } else { - AT91C_BASE_EFC0->EFC_FMR = - MC_FLASH_MODE_FLASH_WAIT_STATES(0) | - MC_FLASH_MODE_MASTER_CLK_IN_MHZ(48); - } + AT91C_BASE_EFC0->EFC_FMR = + AT91C_MC_FWS_1FWS | + MC_FLASH_MODE_MASTER_CLK_IN_MHZ(48); // Initialize all system clocks ConfigClocks(); @@ -297,10 +319,10 @@ void BootROM(void) flash_mode(1); } else if(BUTTON_PRESS()) { flash_mode(0); - } else if(*(uint32_t*)&_osimage_entry == 0xffffffffU) { + } else if(_osimage_entry == 0xffffffffU) { flash_mode(1); } else { // jump to Flash address of the osimage entry point (LSBit set for thumb mode) - asm("bx %0\n" : : "r" ( ((int)&_osimage_entry) | 0x1 ) ); + __asm("bx %0\n" : : "r" ( ((int)&_osimage_entry) | 0x1 ) ); } }