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55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
//
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// Authors: Wolfgang Spraul <wolfgang@sharism.cc>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version
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// 3 of the License, or (at your option) any later version.
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//
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#include "common.h"
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#include "serial.h"
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extern void gpio_init_4740();
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extern void pll_init_4740();
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extern void serial_init_4740(int uart);
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extern void sdram_init_4740();
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extern void nand_init_4740();
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void load_args()
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{
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ARG_CPU_ID = 0x4740;
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ARG_EXTAL = 12 * 1000000;
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ARG_CPU_SPEED = 21 * ARG_EXTAL;
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ARG_PHM_DIV = 3;
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ARG_UART_BAUD = 57600;
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ARG_BUS_WIDTH_16 = * (int *)0x80002014;
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ARG_BANK_ADDR_2BIT = 1;
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ARG_ROW_ADDR = 13;
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ARG_COL_ADDR = 9;
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}
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void c_main(void)
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{
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load_args();
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switch (ARG_CPU_ID) {
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case 0x4740:
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gpio_init_4740();
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serial_init_4740(0);
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pll_init_4740();
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sdram_init_4740();
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nand_init_4740();
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break;
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case 0x4760:
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break;
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default:
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return;
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}
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serial_puts("stage 1 finished: GPIO, clocks, SDRAM, UART setup\n"
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"now jump back to BOOT ROM...\n");
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}
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