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 DECLARE_GLOBAL_DATA_PTR;
14 int board_early_init_f(void)
16 /*-------------------------------------------------------------------------+
17 | Interrupt controller setup for the Walnut/Sycamore board.
18 | Note: IRQ 0-15 405GP internally generated; active high; level sensitive
19 | IRQ 16 405GP internally generated; active low; level sensitive
21 | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
22 | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
23 | IRQ 27 (EXT IRQ 2) Not Used
24 | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
25 | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
26 | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
27 | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
28 | Note for Walnut board:
29 | An interrupt taken for the FPGA (IRQ 25) indicates that either
30 | the Mouse, Keyboard, IRDA, or External Expansion caused the
31 | interrupt. The FPGA must be read to determine which device
32 | caused the interrupt. The default setting of the FPGA clears
34 +-------------------------------------------------------------------------*/
36 mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
37 mtdcr(UIC0ER, 0x00000000); /* disable all ints */
38 mtdcr(UIC0CR, 0x00000020); /* set all but FPGA SMI to be non-critical */
39 mtdcr(UIC0PR, 0xFFFFFFE0); /* set int polarities */
40 mtdcr(UIC0TR, 0x10000000); /* set int trigger levels */
41 mtdcr(UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
42 mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
44 /* set UART1 control to select CTS/RTS */
45 #define FPGA_BRDC 0xF0300004
46 *(volatile char *)(FPGA_BRDC) |= 0x1;
52 * Check Board Identity:
57 int i = getenv_f("serial#", buf, sizeof(buf));
60 if (pvr == PVR_405GPR_RB) {
61 puts("Board: Sycamore - AMCC PPC405GPr Evaluation Board");
63 puts("Board: Walnut - AMCC PPC405GP Evaluation Board");
76 * initdram() reads EEPROM via I2c. EEPROM contains all of
77 * the necessary info for SDRAM controller configuration
81 gd->ram_size = spd_sdram();