/* mini - a Free Software replacement for the Nintendo/BroadOn IOS. boot2 chainloader Copyright (C) 2008, 2009 Hector Martin "marcan" Copyright (C) 2008, 2009 Sven Peter This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "types.h" #include "irq.h" #include "start.h" #include "vsprintf.h" #include "string.h" #include "utils.h" #include "hollywood.h" #include "powerpc.h" #include "powerpc_elf.h" #include "gecko.h" static u8 gecko_console_enabled = 0; static u32 _gecko_command(u32 command) { u32 i; // Memory Card Port B (Channel 1, Device 0, Frequency 3 (32Mhz Clock)) write32(EXI1_CSR, 0xd0); write32(EXI1_DATA, command); write32(EXI1_CR, 0x19); i = 1000; while ((read32(EXI1_CR) & 1) && (i--)); i = read32(EXI1_DATA); write32(EXI1_CSR, 0); return i; } static u32 _gecko_sendbyte(u8 sendbyte) { u32 i = 0; i = _gecko_command(0xB0000000 | (sendbyte<<20)); if (i&0x04000000) return 1; // Return 1 if byte was sent return 0; } static u32 _gecko_recvbyte(u8 *recvbyte) { u32 i = 0; *recvbyte = 0; i = _gecko_command(0xA0000000); if (i&0x08000000) { // Return 1 if byte was received *recvbyte = (i>>16)&0xff; return 1; } return 0; } #if 0 static u32 _gecko_checksend(void) { u32 i = 0; i = _gecko_command(0xC0000000); if (i&0x04000000) return 1; // Return 1 if safe to send return 0; } #endif static u32 _gecko_checkrecv(void) { u32 i = 0; i = _gecko_command(0xD0000000); if (i&0x04000000) return 1; // Return 1 if safe to recv return 0; } static int gecko_isalive(void) { u32 i = 0; i = _gecko_command(0x90000000); if (i&0x04700000) return 1; return 0; } static void gecko_flush(void) { u8 tmp; while(_gecko_recvbyte(&tmp)); } #if 0 static int gecko_recvbuffer(void *buffer, u32 size) { u32 left = size; char *ptr = (char*)buffer; while(left>0) { if(!_gecko_recvbyte(ptr)) break; ptr++; left--; } return (size - left); } #endif static int gecko_sendbuffer(const void *buffer, u32 size) { u32 left = size; char *ptr = (char*)buffer; while(left>0) { if(!_gecko_sendbyte(*ptr)) break; ptr++; left--; } return (size - left); } #if 0 static int gecko_recvbuffer_safe(void *buffer, u32 size) { u32 left = size; char *ptr = (char*)buffer; while(left>0) { if(_gecko_checkrecv()) { if(!_gecko_recvbyte(ptr)) break; ptr++; left--; } } return (size - left); } static int gecko_sendbuffer_safe(const void *buffer, u32 size) { u32 left = size; char *ptr = (char*)buffer; if((read32(HW_EXICTRL) & EXICTRL_ENABLE_EXI) == 0) return left; while(left>0) { if(_gecko_checksend()) { if(!_gecko_sendbyte(*ptr)) break; ptr++; left--; } } return (size - left); } #endif void gecko_init(void) { write32(EXI0_CSR, 0); write32(EXI1_CSR, 0); write32(EXI2_CSR, 0); write32(EXI0_CSR, 0x2000); write32(EXI0_CSR, 3<<10); write32(EXI1_CSR, 3<<10); if (!gecko_isalive()) return; gecko_flush(); gecko_console_enabled = 1; } u8 gecko_enable_console(const u8 enable) { if (enable) { if (gecko_isalive()) gecko_console_enabled = 1; } else gecko_console_enabled = 0; return gecko_console_enabled; } int gecko_printf(const char *fmt, ...) { if (!gecko_console_enabled) return 0; va_list args; char buffer[256]; int i; va_start(args, fmt); i = vsprintf(buffer, fmt, args); va_end(args); return gecko_sendbuffer(buffer, i); } // irq context #define GECKO_STATE_NONE 0 #define GECKO_STATE_RECEIVE_BUFFER_SIZE 1 #define GECKO_STATE_RECEIVE_BUFFER 2 static u32 _gecko_cmd = 0; static u32 _gecko_cmd_start_time = 0; static u32 _gecko_state = GECKO_STATE_NONE; static u32 _gecko_receive_left = 0; static u32 _gecko_receive_len = 0; static u8 *_gecko_receive_buffer = NULL; void gecko_timer_initialize(void) { if (!gecko_isalive()) return; irq_set_alarm(20, 1); } void gecko_timer(void) { u8 b; if (_gecko_cmd_start_time && read32(HW_TIMER) > (_gecko_cmd_start_time + IRQ_ALARM_MS2REG(5000))) goto cleanup; switch (_gecko_state) { case GECKO_STATE_NONE: if (!_gecko_checkrecv() || !_gecko_recvbyte(&b)) return; _gecko_cmd <<= 8; _gecko_cmd |= b; switch (_gecko_cmd) { // upload powerpc ELF case 0x43524150: _gecko_state = GECKO_STATE_RECEIVE_BUFFER_SIZE; _gecko_receive_len = 0; _gecko_receive_left = 4; _gecko_receive_buffer = (u8 *) 0x10100000; irq_set_alarm(1, 0); _gecko_cmd_start_time = read32(HW_TIMER); break; // upload ARM ELF case 0x5a4f4d47: _gecko_state = GECKO_STATE_RECEIVE_BUFFER_SIZE; _gecko_receive_len = 0; _gecko_receive_left = 4; _gecko_receive_buffer = (u8 *) 0x0; // yarly irq_set_alarm(1, 0); _gecko_cmd_start_time = read32(HW_TIMER); break; } return; case GECKO_STATE_RECEIVE_BUFFER_SIZE: if (!_gecko_checkrecv() || !_gecko_recvbyte(&b)) return; _gecko_receive_len <<= 8; _gecko_receive_len |= b; _gecko_receive_left--; if (!_gecko_receive_left) { _gecko_state = GECKO_STATE_RECEIVE_BUFFER; _gecko_receive_left = _gecko_receive_len; // sorry pal, that memory is mine now powerpc_hang(); gecko_printf("MINI/GECKO: PPC halted, receiving data...\n"); } return; case GECKO_STATE_RECEIVE_BUFFER: while (_gecko_receive_left) { if (!_gecko_checkrecv() || !_gecko_recvbyte(_gecko_receive_buffer)) return; _gecko_receive_buffer++; _gecko_receive_left--; } if (!_gecko_receive_left) break; return; default: gecko_printf("MINI/GECKO: internal error\n"); return; } // done receiving, handle the command switch (_gecko_cmd) { case 0x43524150: if (powerpc_boot_mem((u8 *) 0x10100000, _gecko_receive_len)) gecko_printf("MINI/GECKO: the received binary is not a valid " "PPC ELF. Broadway is dead now.\n"); break; case 0x5a4f4d47: // skip headerlen, which is stored at u32[0] ipc_queue_slow_jump(((u32 *) 0x0)[0]); break; } cleanup: gecko_flush(); irq_set_alarm(20, 0); _gecko_cmd = 0; _gecko_cmd_start_time = 0; _gecko_state = GECKO_STATE_NONE; }