gardenia/loader/main.c

124 lines
3.0 KiB
C

/*
* Copyright (c) 2024 hydrogenium2020-offical
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018-2023 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include "types.h"
#include "printf.h"
#include "string.h"
#include "t124.h"
#include "usb.h"
#include "bootrom.h"
#include "fuse.h"
#include "mc.h"
#include "clock.h"
#include "util.h"
#include "pinmux.h"
#include "gpio.h"
#include "uart.h"
#include "sdram.h"
#include "memory_map.h"
static inline u32 read32(uintptr_t addr) {
return *(vu32 *)addr;
}
static inline void write32(uintptr_t addr, u32 val) {
*(vu32 *)addr = val;
}
static inline void or32(uintptr_t addr, u32 val) {
write32(addr, read32(addr) | val);
}
void *memset(void *s, int c, size_t n) {
unsigned char* p = (unsigned char*)s;
for (size_t i = 0; i < n; i++) {
*p++ = (unsigned char)c;
}
return s;
}
#define PMC_CNTRL 0x000
#define PMC_CNTRL_MAIN_RST (1 << 4)
#define PMC_SCRATCH0 0x050
#define PMC_SCRATCH0_MODE_RCM (1 << 1)
void enter_rcm() {
or32(PMC_BASE + PMC_SCRATCH0, PMC_SCRATCH0_MODE_RCM);
or32(PMC_BASE + PMC_CNTRL, PMC_CNTRL_MAIN_RST);
}
void config_hw(){
printf_("Starting Initing hardware.\n");
fuse_disable_program();
printf_("[x] fuse program disabled\n");
// Initialize oscillators
config_oscillators();
// My board didn't have UART port
// pinmux_config_uart(UART_D);
// clock_enable_uart(UART_D);
// uart_init(UART_D, 115200, UART_AO_TX_AO_RX);
// uart_invert(UART_D, 0, UART_INVERT_TXD);
//uart_send(UART_D, (u8 *)"hekate: Hello!\r\n", 16);
//uart_wait_xfer(UART_D, UART_TX_IDLE);
// mc_enable();
// printf_("[x] mc setup\n");
config_gpios();
printf_("[x] GPIO setup\n");
sdram_init();
printf_("[x] SDRAM setup\n");
}
extern void pivot_stack(u32 stack_top);
__attribute__((section(".init")))
void _start() {
// u8 *buffer = (u8*)0x40020000;
printf_("gardenia is booting.\n");
//printf_("%p",&_start);
//Setting up hardware
dump_pkc();
config_hw();
printf_("%d\n",MMIO_REG32(0x90010000,0));
MMIO_REG32(0x90010000,0)=0x123456;
printf_("%d\n",MMIO_REG32(0x90010000,0));
sleep(200);
printf_("%d\n",MMIO_REG32(0x90010000,0));
u32 total_size = (MC(MC_EMEM_CFG) >>
MC_EMEM_CFG_SIZE_MB_SHIFT) & MC_EMEM_CFG_SIZE_MB_MASK;
printf_("Total SDRAM (MB): %u\n", total_size);
//Pivot the stack so we have enough space.
pivot_stack(IPL_STACK_TOP);
printf_("alive");
heap_init(IPL_HEAP_START);
enter_rcm();
}