2 * (C) Copyright 2000-2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/processor.h>
10 #include <spd_sdram.h>
12 int board_early_init_f(void)
14 /*-------------------------------------------------------------------------+
15 | Interrupt controller setup for the Walnut/Sycamore board.
16 | Note: IRQ 0-15 405GP internally generated; active high; level sensitive
17 | IRQ 16 405GP internally generated; active low; level sensitive
19 | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
20 | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
21 | IRQ 27 (EXT IRQ 2) Not Used
22 | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
23 | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
24 | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
25 | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
26 | Note for Walnut board:
27 | An interrupt taken for the FPGA (IRQ 25) indicates that either
28 | the Mouse, Keyboard, IRDA, or External Expansion caused the
29 | interrupt. The FPGA must be read to determine which device
30 | caused the interrupt. The default setting of the FPGA clears
32 +-------------------------------------------------------------------------*/
34 mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
35 mtdcr(UIC0ER, 0x00000000); /* disable all ints */
36 mtdcr(UIC0CR, 0x00000020); /* set all but FPGA SMI to be non-critical */
37 mtdcr(UIC0PR, 0xFFFFFFE0); /* set int polarities */
38 mtdcr(UIC0TR, 0x10000000); /* set int trigger levels */
39 mtdcr(UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
40 mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
42 /* set UART1 control to select CTS/RTS */
43 #define FPGA_BRDC 0xF0300004
44 *(volatile char *)(FPGA_BRDC) |= 0x1;
50 * Check Board Identity:
55 int i = getenv_f("serial#", buf, sizeof(buf));
58 if (pvr == PVR_405GPR_RB) {
59 puts("Board: Sycamore - AMCC PPC405GPr Evaluation Board");
61 puts("Board: Walnut - AMCC PPC405GP Evaluation Board");
74 * initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
75 * the necessary info for SDRAM controller configuration
77 phys_size_t initdram(int board_type)