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/*
* arch/ppc/boot/simple/misc-prep.c
*
* Maintainer: Tom Rini <trini@kernel.crashing.org>
*
* In the past: Gary Thomas, Cort Dougan <cort@cs.nmt.edu>
*/
#include <linux/config.h>
#include <linux/pci_ids.h>
#include <linux/types.h>
#include <asm/residual.h>
#include <asm/string.h>
#include <asm/byteorder.h>
#include "mpc10x.h"
#include "of1275.h"
#include "nonstdio.h"
extern int keyb_present; /* keyboard controller is present by default */
RESIDUAL hold_resid_buf;
RESIDUAL *hold_residual = &hold_resid_buf;
static void *OFW_interface; /* Pointer to OF, if available. */
#ifdef CONFIG_VGA_CONSOLE
char *vidmem = (char *)0xC00B8000;
int lines = 25, cols = 80;
int orig_x, orig_y = 24;
#endif /* CONFIG_VGA_CONSOLE */
extern int CRT_tstc(void);
extern int vga_init(unsigned char *ISA_mem);
extern void gunzip(void *, int, unsigned char *, int *);
extern unsigned long serial_init(int chan, void *ignored);
extern void serial_fixups(void);
extern struct bi_record *decompress_kernel(unsigned long load_addr,
int num_words, unsigned long cksum);
extern void disable_6xx_mmu(void);
extern unsigned long mpc10x_get_mem_size(void);
static void
writel(unsigned int val, unsigned int address)
{
/* Ensure I/O operations complete */
__asm__ volatile("eieio");
*(unsigned int *)address = cpu_to_le32(val);
}
#define PCI_CFG_ADDR(dev,off) ((0x80<<24) | (dev<<8) | (off&0xfc))
#define PCI_CFG_DATA(off) (MPC10X_MAPA_CNFG_DATA+(off&3))
static void
pci_read_config_32(unsigned char devfn,
unsigned char offset,
unsigned int *val)
{
/* Ensure I/O operations complete */
__asm__ volatile("eieio");
*(unsigned int *)PCI_CFG_ADDR(devfn,offset) =
cpu_to_le32(MPC10X_MAPA_CNFG_ADDR);
/* Ensure I/O operations complete */
__asm__ volatile("eieio");
*val = le32_to_cpu(*(unsigned int *)PCI_CFG_DATA(offset));
return;
}
#ifdef CONFIG_VGA_CONSOLE
void
scroll(void)
{
int i;
memcpy ( vidmem, vidmem + cols * 2, ( lines - 1 ) * cols * 2 );
for ( i = ( lines - 1 ) * cols * 2; i < lines * cols * 2; i += 2 )
vidmem[i] = ' ';
}
#endif /* CONFIG_VGA_CONSOLE */
unsigned long
load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
RESIDUAL *residual, void *OFW)
{
int start_multi = 0;
unsigned int pci_viddid, pci_did, tulip_pci_base, tulip_base;
/* If we have Open Firmware, initialise it immediately */
if (OFW) {
OFW_interface = OFW;
ofinit(OFW_interface);
}
board_isa_init();
#if defined(CONFIG_VGA_CONSOLE)
vga_init((unsigned char *)0xC0000000);
#endif /* CONFIG_VGA_CONSOLE */
if (residual) {
/* Is this Motorola PPCBug? */
if ((1 & residual->VitalProductData.FirmwareSupports) &&
(1 == residual->VitalProductData.FirmwareSupplier)) {
unsigned char base_mod;
unsigned char board_type = inb(0x801) & 0xF0;
/*
* Reset the onboard 21x4x Ethernet
* Motorola Ethernet is at IDSEL 14 (devfn 0x70)
*/
pci_read_config_32(0x70, 0x00, &pci_viddid);
pci_did = (pci_viddid & 0xffff0000) >> 16;
/* Be sure we've really found a 21x4x chip */
if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_DEC) &&
((pci_did == PCI_DEVICE_ID_DEC_TULIP_FAST) ||
(pci_did == PCI_DEVICE_ID_DEC_TULIP) ||
(pci_did == PCI_DEVICE_ID_DEC_TULIP_PLUS) ||
(pci_did == PCI_DEVICE_ID_DEC_21142))) {
pci_read_config_32(0x70,
0x10,
&tulip_pci_base);
/* Get the physical base address */
tulip_base =
(tulip_pci_base & ~0x03UL) + 0x80000000;
/* Strobe the 21x4x reset bit in CSR0 */
writel(0x1, tulip_base);
}
/* If this is genesis 2 board then check for no
* keyboard controller and more than one processor.
*/
if (board_type == 0xe0) {
base_mod = inb(0x803);
/* if a MVME2300/2400 or a Sitka then no keyboard */
if((base_mod == 0xFA) || (base_mod == 0xF9) ||
(base_mod == 0xE1)) {
keyb_present = 0; /* no keyboard */
}
}
/* If this is a multiprocessor system then
* park the other processor so that the
* kernel knows where to find them.
*/
if (residual->MaxNumCpus > 1)
start_multi = 1;
}
memcpy(hold_residual,residual,sizeof(RESIDUAL));
}
/* Call decompress_kernel */
decompress_kernel(load_addr, num_words, cksum);
if (start_multi) {
residual->VitalProductData.SmpIar = (unsigned long)0xc0;
residual->Cpus[1].CpuState = CPU_GOOD;
hold_residual->VitalProductData.Reserved5 = 0xdeadbeef;
}
/* Now go and clear out the BATs and ensure that our MSR is
* correct .*/
disable_6xx_mmu();
/* Make r3 be a pointer to the residual data. */
return (unsigned long)hold_residual;
}
unsigned long
get_mem_size(void)
{
unsigned int pci_viddid, pci_did;
/* First, figure out what kind of host bridge we are on. If it's
* an MPC10x, we can ask it directly how much memory it has.
* Otherwise, see if the residual data has anything. This isn't
* the best way, but it can be the only way. If there's nothing,
* assume 32MB. -- Tom.
*/
/* See what our host bridge is. */
pci_read_config_32(0x00, 0x00, &pci_viddid);
pci_did = (pci_viddid & 0xffff0000) >> 16;
/* See if we are on an MPC10x. */
if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
&& ((pci_did == PCI_DEVICE_ID_MOTOROLA_MPC105)
|| (pci_did == PCI_DEVICE_ID_MOTOROLA_MPC106)
|| (pci_did == PCI_DEVICE_ID_MOTOROLA_MPC107)))
return mpc10x_get_mem_size();
/* If it's not, see if we have anything in the residual data. */
else if (hold_residual && hold_residual->TotalMemory)
return hold_residual->TotalMemory;
else if (OFW_interface) {
/*
* This is a 'best guess' check. We want to make sure
* we don't try this on a PReP box without OF
* -- Cort
*/
while (OFW_interface)
{
phandle dev_handle;
int mem_info[2];
/* get handle to memory description */
if (!(dev_handle = finddevice("/memory@0")))
break;
/* get the info */
if (getprop(dev_handle, "reg", mem_info,
sizeof(mem_info)) != 8)
break;
return mem_info[1];
}
}
/* Fall back to hard-coding 32MB. */
return 32*1024*1024;
}
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