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#include <common.h>
#include <asm/u-boot.h>
#include <asm/processor.h>
#include "exbitgen.h"
void sdram_init(void);
/* ************************************************************************ */
int board_early_init_f (void)
/* ------------------------------------------------------------------------ --
* Purpose :
* Remarks :
* Restrictions:
* See also :
* Example :
* ************************************************************************ */
{
unsigned long i;
/*-------------------------------------------------------------------------+
| Interrupt controller setup for the Walnut board.
| Note: IRQ 0-15 405GP internally generated; active high; level sensitive
| IRQ 16 405GP internally generated; active low; level sensitive
| IRQ 17-24 RESERVED
| IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
| IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
| IRQ 27 (EXT IRQ 2) Not Used
| IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
| IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
| IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
| IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
| Note for Walnut board:
| An interrupt taken for the FPGA (IRQ 25) indicates that either
| the Mouse, Keyboard, IRDA, or External Expansion caused the
| interrupt. The FPGA must be read to determine which device
| caused the interrupt. The default setting of the FPGA clears
|
+-------------------------------------------------------------------------*/
mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
mtdcr (UIC0ER, 0x00000000); /* disable all ints */
mtdcr (UIC0CR, 0x00000020); /* set all but FPGA SMI to be non-critical */
mtdcr (UIC0PR, 0xFFFFFF90); /* set int polarities */
mtdcr (UIC0TR, 0x10000000); /* set int trigger levels */
mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
/* Perform reset of PHY connected to PPC via register in CPLD */
out8 (PHY_CTRL_ADDR, 0x2e); /* activate nRESET,FDX,F100,ANEN, enable output */
for (i = 0; i < 10000000; i++) {
;
}
out8 (PHY_CTRL_ADDR, 0x2f); /* deactivate nRESET */
return 0;
}
/* ************************************************************************ */
int checkboard (void)
/* ------------------------------------------------------------------------ --
* Purpose :
* Remarks :
* Restrictions:
* See also :
* Example :
* ************************************************************************ */
{
printf ("Exbit H/W id: %d\n", in8 (HW_ID_ADDR));
return (0);
}
/* ************************************************************************ */
phys_size_t initdram (int board_type)
/* ------------------------------------------------------------------------ --
* Purpose : Determines size of mounted DRAM.
* Remarks : Size is determined by reading SDRAM configuration registers as
* set up by sdram_init.
* Restrictions:
* See also :
* Example :
* ************************************************************************ */
{
ulong tot_size;
ulong bank_size;
ulong tmp;
/*
* ToDo: Move the asm init routine sdram_init() to this C file,
* or even better use some common ppc4xx code available
* in cpu/ppc4xx
*/
sdram_init();
tot_size = 0;
mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
tmp = mfdcr (SDRAM0_CFGDATA);
if (tmp & 0x00000001) {
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
tot_size += bank_size;
}
mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR);
tmp = mfdcr (SDRAM0_CFGDATA);
if (tmp & 0x00000001) {
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
tot_size += bank_size;
}
mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR);
tmp = mfdcr (SDRAM0_CFGDATA);
if (tmp & 0x00000001) {
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
tot_size += bank_size;
}
mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR);
tmp = mfdcr (SDRAM0_CFGDATA);
if (tmp & 0x00000001) {
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
tot_size += bank_size;
}
return tot_size;
}
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