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linux/arch/ppc/platforms/pplus.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

918 lines
24 KiB
C
Raw Blame History

/*
* arch/ppc/platforms/pplus.c
*
* Board and PCI setup routines for MCG PowerPlus
*
* Author: Randy Vinson <rvinson@mvista.com>
*
* Derived from original PowerPlus PReP work by
* Cort Dougan, Johnnie Peters, Matt Porter, and
* Troy Benjegerdes.
*
* 2001-2004 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/prep_nvram.h>
#include <asm/vga.h>
#include <asm/i8259.h>
#include <asm/open_pic.h>
#include <asm/hawk.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/kgdb.h>
#include <asm/reg.h>
#include "pplus.h"
#undef DUMP_DBATS
TODC_ALLOC();
extern void pplus_setup_hose(void);
extern void pplus_set_VIA_IDE_native(void);
extern unsigned long loops_per_jiffy;
unsigned char *Motherboard_map_name;
/* Tables for known hardware */
/* Motorola Mesquite */
static inline int
mesquite_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* MPIC interrupts for various IDSEL values (MPIC IRQ0 =
* Linux IRQ16 (to leave room for ISA IRQs at 0-15).
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{18, 0, 0, 0}, /* IDSEL 14 - Enet 0 */
{ 0, 0, 0, 0}, /* IDSEL 15 - unused */
{19, 19, 19, 19}, /* IDSEL 16 - PMC Slot 1 */
{ 0, 0, 0, 0}, /* IDSEL 17 - unused */
{ 0, 0, 0, 0}, /* IDSEL 18 - unused */
{ 0, 0, 0, 0}, /* IDSEL 19 - unused */
{24, 25, 26, 27}, /* IDSEL 20 - P2P bridge (to cPCI 1) */
{ 0, 0, 0, 0}, /* IDSEL 21 - unused */
{28, 29, 30, 31} /* IDSEL 22 - P2P bridge (to cPCI 2) */
};
const long min_idsel = 14, max_idsel = 22, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
/* Motorola Sitka */
static inline int
sitka_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* MPIC interrupts for various IDSEL values (MPIC IRQ0 =
* Linux IRQ16 (to leave room for ISA IRQs at 0-15).
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{18, 0, 0, 0}, /* IDSEL 14 - Enet 0 */
{ 0, 0, 0, 0}, /* IDSEL 15 - unused */
{25, 26, 27, 28}, /* IDSEL 16 - PMC Slot 1 */
{28, 25, 26, 27}, /* IDSEL 17 - PMC Slot 2 */
{ 0, 0, 0, 0}, /* IDSEL 18 - unused */
{ 0, 0, 0, 0}, /* IDSEL 19 - unused */
{20, 0, 0, 0} /* IDSEL 20 - P2P bridge (to cPCI) */
};
const long min_idsel = 14, max_idsel = 20, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
/* Motorola MTX */
static inline int
MTX_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* MPIC interrupts for various IDSEL values (MPIC IRQ0 =
* Linux IRQ16 (to leave room for ISA IRQs at 0-15).
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{19, 0, 0, 0}, /* IDSEL 12 - SCSI */
{ 0, 0, 0, 0}, /* IDSEL 13 - unused */
{18, 0, 0, 0}, /* IDSEL 14 - Enet */
{ 0, 0, 0, 0}, /* IDSEL 15 - unused */
{25, 26, 27, 28}, /* IDSEL 16 - PMC Slot 1 */
{26, 27, 28, 25}, /* IDSEL 17 - PMC Slot 2 */
{27, 28, 25, 26} /* IDSEL 18 - PCI Slot 3 */
};
const long min_idsel = 12, max_idsel = 18, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
/* Motorola MTX Plus */
/* Secondary bus interrupt routing is not supported yet */
static inline int
MTXplus_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* MPIC interrupts for various IDSEL values (MPIC IRQ0 =
* Linux IRQ16 (to leave room for ISA IRQs at 0-15).
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{19, 0, 0, 0}, /* IDSEL 12 - SCSI */
{ 0, 0, 0, 0}, /* IDSEL 13 - unused */
{18, 0, 0, 0}, /* IDSEL 14 - Enet 1 */
{ 0, 0, 0, 0}, /* IDSEL 15 - unused */
{25, 26, 27, 28}, /* IDSEL 16 - PCI Slot 1P */
{26, 27, 28, 25}, /* IDSEL 17 - PCI Slot 2P */
{27, 28, 25, 26}, /* IDSEL 18 - PCI Slot 3P */
{26, 0, 0, 0}, /* IDSEL 19 - Enet 2 */
{ 0, 0, 0, 0} /* IDSEL 20 - P2P Bridge */
};
const long min_idsel = 12, max_idsel = 20, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
static inline int
Genesis2_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
/* 2600
* Raven 31
* ISA 11
* SCSI 12 - IRQ3
* Univ 13
* eth 14 - IRQ2
* VGA 15 - IRQ4
* PMC1 16 - IRQ9,10,11,12 = PMC1 A-D
* PMC2 17 - IRQ12,9,10,11 = A-D
* SCSI2 18 - IRQ11
* eth2 19 - IRQ10
* PCIX 20 - IRQ9,10,11,12 = PCI A-D
*/
/* 2400
* Hawk 31
* ISA 11
* Univ 13
* eth 14 - IRQ2
* PMC1 16 - IRQ9,10,11,12 = PMC A-D
* PMC2 17 - IRQ12,9,10,11 = PMC A-D
* PCIX 20 - IRQ9,10,11,12 = PMC A-D
*/
/* 2300
* Raven 31
* ISA 11
* Univ 13
* eth 14 - IRQ2
* PMC1 16 - 9,10,11,12 = A-D
* PMC2 17 - 9,10,11,12 = B,C,D,A
*/
static char pci_irq_table[][4] =
/*
* MPIC interrupts for various IDSEL values (MPIC IRQ0 =
* Linux IRQ16 (to leave room for ISA IRQs at 0-15).
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{19, 0, 0, 0}, /* IDSEL 12 - SCSI */
{ 0, 0, 0, 0}, /* IDSEL 13 - Universe PCI - VME */
{18, 0, 0, 0}, /* IDSEL 14 - Enet 1 */
{ 0, 0, 0, 0}, /* IDSEL 15 - unused */
{25, 26, 27, 28}, /* IDSEL 16 - PCI/PMC Slot 1P */
{28, 25, 26, 27}, /* IDSEL 17 - PCI/PMC Slot 2P */
{27, 28, 25, 26}, /* IDSEL 18 - PCI Slot 3P */
{26, 0, 0, 0}, /* IDSEL 19 - Enet 2 */
{25, 26, 27, 28} /* IDSEL 20 - P2P Bridge */
};
const long min_idsel = 12, max_idsel = 20, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
#define MOTOROLA_CPUTYPE_REG 0x800
#define MOTOROLA_BASETYPE_REG 0x803
#define MPIC_RAVEN_ID 0x48010000
#define MPIC_HAWK_ID 0x48030000
#define MOT_PROC2_BIT 0x800
static u_char pplus_openpic_initsenses[] __initdata = {
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* MVME2600_INT_SIO */
(IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE),/*MVME2600_INT_FALCN_ECC_ERR */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/*MVME2600_INT_PCI_ETHERNET */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_SCSI */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/*MVME2600_INT_PCI_GRAPHICS */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME3 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTA */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTB */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTC */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTD */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_LM_SIG0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_LM_SIG1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),
};
int mot_entry = -1;
int prep_keybd_present = 1;
int mot_multi = 0;
struct brd_info {
/* 0x100 mask assumes for Raven and Hawk boards that the level/edge
* are set */
int cpu_type;
/* 0x200 if this board has a Hawk chip. */
int base_type;
/* or'ed with 0x80 if this board should be checked for multi CPU */
int max_cpu;
const char *name;
int (*map_irq) (struct pci_dev *, unsigned char, unsigned char);
};
struct brd_info mot_info[] = {
{0x300, 0x00, 0x00, "MVME 2400", Genesis2_map_irq},
{0x1E0, 0xE0, 0x00, "Mesquite cPCI (MCP750)", mesquite_map_irq},
{0x1E0, 0xE1, 0x00, "Sitka cPCI (MCPN750)", sitka_map_irq},
{0x1E0, 0xE2, 0x00, "Mesquite cPCI (MCP750) w/ HAC", mesquite_map_irq},
{0x1E0, 0xF6, 0x80, "MTX Plus", MTXplus_map_irq},
{0x1E0, 0xF6, 0x81, "Dual MTX Plus", MTXplus_map_irq},
{0x1E0, 0xF7, 0x80, "MTX wo/ Parallel Port", MTX_map_irq},
{0x1E0, 0xF7, 0x81, "Dual MTX wo/ Parallel Port", MTX_map_irq},
{0x1E0, 0xF8, 0x80, "MTX w/ Parallel Port", MTX_map_irq},
{0x1E0, 0xF8, 0x81, "Dual MTX w/ Parallel Port", MTX_map_irq},
{0x1E0, 0xF9, 0x00, "MVME 2300", Genesis2_map_irq},
{0x1E0, 0xFA, 0x00, "MVME 2300SC/2600", Genesis2_map_irq},
{0x1E0, 0xFB, 0x00, "MVME 2600 with MVME712M", Genesis2_map_irq},
{0x1E0, 0xFC, 0x00, "MVME 2600/2700 with MVME761", Genesis2_map_irq},
{0x1E0, 0xFD, 0x80, "MVME 3600 with MVME712M", Genesis2_map_irq},
{0x1E0, 0xFD, 0x81, "MVME 4600 with MVME712M", Genesis2_map_irq},
{0x1E0, 0xFE, 0x80, "MVME 3600 with MVME761", Genesis2_map_irq},
{0x1E0, 0xFE, 0x81, "MVME 4600 with MVME761", Genesis2_map_irq},
{0x000, 0x00, 0x00, "", NULL}
};
void __init pplus_set_board_type(void)
{
unsigned char cpu_type;
unsigned char base_mod;
int entry;
unsigned short devid;
unsigned long *ProcInfo = NULL;
cpu_type = inb(MOTOROLA_CPUTYPE_REG) & 0xF0;
base_mod = inb(MOTOROLA_BASETYPE_REG);
early_read_config_word(0, 0, 0, PCI_VENDOR_ID, &devid);
for (entry = 0; mot_info[entry].cpu_type != 0; entry++) {
/* Check for Hawk chip */
if (mot_info[entry].cpu_type & 0x200) {
if (devid != PCI_DEVICE_ID_MOTOROLA_HAWK)
continue;
} else {
/* store the system config register for later use. */
ProcInfo =
(unsigned long *)ioremap(PPLUS_SYS_CONFIG_REG, 4);
/* Check non hawk boards */
if ((mot_info[entry].cpu_type & 0xff) != cpu_type)
continue;
if (mot_info[entry].base_type == 0) {
mot_entry = entry;
break;
}
if (mot_info[entry].base_type != base_mod)
continue;
}
if (!(mot_info[entry].max_cpu & 0x80)) {
mot_entry = entry;
break;
}
/* processor 1 not present and max processor zero indicated */
if ((*ProcInfo & MOT_PROC2_BIT)
&& !(mot_info[entry].max_cpu & 0x7f)) {
mot_entry = entry;
break;
}
/* processor 1 present and max processor zero indicated */
if (!(*ProcInfo & MOT_PROC2_BIT)
&& (mot_info[entry].max_cpu & 0x7f)) {
mot_entry = entry;
break;
}
/* Indicate to system if this is a multiprocessor board */
if (!(*ProcInfo & MOT_PROC2_BIT))
mot_multi = 1;
}
if (mot_entry == -1)
/* No particular cpu type found - assume Mesquite (MCP750) */
mot_entry = 1;
Motherboard_map_name = (unsigned char *)mot_info[mot_entry].name;
ppc_md.pci_map_irq = mot_info[mot_entry].map_irq;
}
void __init pplus_pib_init(void)
{
unsigned char reg;
unsigned short short_reg;
struct pci_dev *dev = NULL;
/*
* Perform specific configuration for the Via Tech or
* or Winbond PCI-ISA-Bridge part.
*/
if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_1, dev))) {
/*
* PPCBUG does not set the enable bits
* for the IDE device. Force them on here.
*/
pci_read_config_byte(dev, 0x40, &reg);
reg |= 0x03; /* IDE: Chip Enable Bits */
pci_write_config_byte(dev, 0x40, reg);
}
if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_2,
dev)) && (dev->devfn = 0x5a)) {
/* Force correct USB interrupt */
dev->irq = 11;
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
}
if ((dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
PCI_DEVICE_ID_WINBOND_83C553, dev))) {
/* Clear PCI Interrupt Routing Control Register. */
short_reg = 0x0000;
pci_write_config_word(dev, 0x44, short_reg);
/* Route IDE interrupts to IRQ 14 */
reg = 0xEE;
pci_write_config_byte(dev, 0x43, reg);
}
if ((dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
PCI_DEVICE_ID_WINBOND_82C105, dev))) {
/*
* Disable LEGIRQ mode so PCI INTS are routed
* directly to the 8259 and enable both channels
*/
pci_write_config_dword(dev, 0x40, 0x10ff0033);
/* Force correct IDE interrupt */
dev->irq = 14;
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
}
pci_dev_put(dev);
}
void __init pplus_set_VIA_IDE_legacy(void)
{
unsigned short vend, dev;
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_VENDOR_ID, &vend);
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_DEVICE_ID, &dev);
if ((vend == PCI_VENDOR_ID_VIA) &&
(dev == PCI_DEVICE_ID_VIA_82C586_1)) {
unsigned char temp;
/* put back original "standard" port base addresses */
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_0, 0x1f1);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_1, 0x3f5);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_2, 0x171);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_3, 0x375);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_4, 0xcc01);
/* put into legacy mode */
early_read_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
&temp);
temp &= ~0x05;
early_write_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
temp);
}
}
void pplus_set_VIA_IDE_native(void)
{
unsigned short vend, dev;
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_VENDOR_ID, &vend);
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_DEVICE_ID, &dev);
if ((vend == PCI_VENDOR_ID_VIA) &&
(dev == PCI_DEVICE_ID_VIA_82C586_1)) {
unsigned char temp;
/* put into native mode */
early_read_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
&temp);
temp |= 0x05;
early_write_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
temp);
}
}
void __init pplus_pcibios_fixup(void)
{
unsigned char reg;
unsigned short devid;
unsigned char base_mod;
printk(KERN_INFO "Setting PCI interrupts for a \"%s\"\n",
Motherboard_map_name);
/* Setup the Winbond or Via PIB */
pplus_pib_init();
/* Set up floppy in PS/2 mode */
outb(0x09, SIO_CONFIG_RA);
reg = inb(SIO_CONFIG_RD);
reg = (reg & 0x3F) | 0x40;
outb(reg, SIO_CONFIG_RD);
outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
/* This is a hack. If this is a 2300 or 2400 mot board then there is
* no keyboard controller and we have to indicate that.
*/
early_read_config_word(0, 0, 0, PCI_VENDOR_ID, &devid);
base_mod = inb(MOTOROLA_BASETYPE_REG);
if ((devid == PCI_DEVICE_ID_MOTOROLA_HAWK) ||
(base_mod == 0xF9) || (base_mod == 0xFA) || (base_mod == 0xE1))
prep_keybd_present = 0;
}
void __init pplus_find_bridges(void)
{
struct pci_controller *hose;
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->pci_mem_offset = PREP_ISA_MEM_BASE;
hose->io_base_virt = (void *)PREP_ISA_IO_BASE;
pci_init_resource(&hose->io_resource, PPLUS_PCI_IO_START,
PPLUS_PCI_IO_END, IORESOURCE_IO, "PCI host bridge");
pci_init_resource(&hose->mem_resources[0], PPLUS_PROC_PCI_MEM_START,
PPLUS_PROC_PCI_MEM_END, IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = PPLUS_PCI_IO_START;
hose->io_space.end = PPLUS_PCI_IO_END;
hose->mem_space.start = PPLUS_PCI_MEM_START;
hose->mem_space.end = PPLUS_PCI_MEM_END - HAWK_MPIC_SIZE;
if (hawk_init(hose, PPLUS_HAWK_PPC_REG_BASE, PPLUS_PROC_PCI_MEM_START,
PPLUS_PROC_PCI_MEM_END - HAWK_MPIC_SIZE,
PPLUS_PROC_PCI_IO_START, PPLUS_PROC_PCI_IO_END,
PPLUS_PROC_PCI_MEM_END - HAWK_MPIC_SIZE + 1)
!= 0) {
printk(KERN_CRIT "Could not initialize host bridge\n");
}
pplus_set_VIA_IDE_legacy();
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pcibios_fixup = pplus_pcibios_fixup;
ppc_md.pci_swizzle = common_swizzle;
}
static int pplus_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: Motorola MCG\n");
seq_printf(m, "machine\t\t: %s\n", Motherboard_map_name);
return 0;
}
static void __init pplus_setup_arch(void)
{
struct pci_controller *hose;
if (ppc_md.progress)
ppc_md.progress("pplus_setup_arch: enter", 0);
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
if (ppc_md.progress)
ppc_md.progress("pplus_setup_arch: find_bridges", 0);
/* Setup PCI host bridge */
pplus_find_bridges();
hose = pci_bus_to_hose(0);
isa_io_base = (ulong) hose->io_base_virt;
if (ppc_md.progress)
ppc_md.progress("pplus_setup_arch: set_board_type", 0);
pplus_set_board_type();
/* Enable L2. Assume we don't need to flush -- Cort */
*(unsigned char *)(PPLUS_L2_CONTROL_REG) |= 3;
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_SDA2;
#endif
printk(KERN_INFO "Motorola PowerPlus Platform\n");
printk(KERN_INFO
"Port by MontaVista Software, Inc. (source@mvista.com)\n");
#ifdef CONFIG_VGA_CONSOLE
/* remap the VGA memory */
vgacon_remap_base = (unsigned long)ioremap(PPLUS_ISA_MEM_BASE,
0x08000000);
conswitchp = &vga_con;
#endif
#ifdef CONFIG_PPCBUG_NVRAM
/* Read in NVRAM data */
init_prep_nvram();
/* if no bootargs, look in NVRAM */
if (cmd_line[0] == '\0') {
char *bootargs;
bootargs = prep_nvram_get_var("bootargs");
if (bootargs != NULL) {
strcpy(cmd_line, bootargs);
/* again.. */
strcpy(saved_command_line, cmd_line);
}
}
#endif
if (ppc_md.progress)
ppc_md.progress("pplus_setup_arch: exit", 0);
}
static void pplus_restart(char *cmd)
{
unsigned long i = 10000;
local_irq_disable();
/* set VIA IDE controller into native mode */
pplus_set_VIA_IDE_native();
/* set exception prefix high - to the prom */
_nmask_and_or_msr(0, MSR_IP);
/* make sure bit 0 (reset) is a 0 */
outb(inb(0x92) & ~1L, 0x92);
/* signal a reset to system control port A - soft reset */
outb(inb(0x92) | 1, 0x92);
while (i != 0)
i++;
panic("restart failed\n");
}
static void pplus_halt(void)
{
/* set exception prefix high - to the prom */
_nmask_and_or_msr(MSR_EE, MSR_IP);
/* make sure bit 0 (reset) is a 0 */
outb(inb(0x92) & ~1L, 0x92);
/* signal a reset to system control port A - soft reset */
outb(inb(0x92) | 1, 0x92);
while (1) ;
/*
* Not reached
*/
}
static void pplus_power_off(void)
{
pplus_halt();
}
static unsigned int pplus_irq_canonicalize(u_int irq)
{
if (irq == 2)
return 9;
else
return irq;
}
static void __init pplus_init_IRQ(void)
{
int i;
if (ppc_md.progress)
ppc_md.progress("init_irq: enter", 0);
OpenPIC_InitSenses = pplus_openpic_initsenses;
OpenPIC_NumInitSenses = sizeof(pplus_openpic_initsenses);
if (OpenPIC_Addr != NULL) {
openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
openpic_init(NUM_8259_INTERRUPTS);
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
i8259_irq);
ppc_md.get_irq = openpic_get_irq;
}
for (i = 0; i < NUM_8259_INTERRUPTS; i++)
irq_desc[i].handler = &i8259_pic;
i8259_init(0);
if (ppc_md.progress)
ppc_md.progress("init_irq: exit", 0);
}
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
/*
* IDE stuff.
*/
static int pplus_ide_default_irq(unsigned long base)
{
switch (base) {
case 0x1f0:
return 14;
case 0x170:
return 15;
default:
return 0;
}
}
static unsigned long pplus_ide_default_io_base(int index)
{
switch (index) {
case 0:
return 0x1f0;
case 1:
return 0x170;
default:
return 0;
}
}
static void __init
pplus_ide_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
unsigned long ctrl_port, int *irq)
{
unsigned long reg = data_port;
int i;
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
hw->io_ports[i] = reg;
reg += 1;
}
if (ctrl_port)
hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
else
hw->io_ports[IDE_CONTROL_OFFSET] =
hw->io_ports[IDE_DATA_OFFSET] + 0x206;
if (irq != NULL)
*irq = pplus_ide_default_irq(data_port);
}
#endif
#ifdef CONFIG_SMP
/* PowerPlus (MTX) support */
static int __init smp_pplus_probe(void)
{
extern int mot_multi;
if (mot_multi) {
openpic_request_IPIs();
smp_hw_index[1] = 1;
return 2;
}
return 1;
}
static void __init smp_pplus_kick_cpu(int nr)
{
*(unsigned long *)KERNELBASE = nr;
asm volatile ("dcbf 0,%0"::"r" (KERNELBASE):"memory");
printk(KERN_INFO "CPU1 reset, waiting\n");
}
static void __init smp_pplus_setup_cpu(int cpu_nr)
{
if (OpenPIC_Addr)
do_openpic_setup_cpu();
}
static struct smp_ops_t pplus_smp_ops = {
smp_openpic_message_pass,
smp_pplus_probe,
smp_pplus_kick_cpu,
smp_pplus_setup_cpu,
.give_timebase = smp_generic_give_timebase,
.take_timebase = smp_generic_take_timebase,
};
#endif /* CONFIG_SMP */
#ifdef DUMP_DBATS
static void print_dbat(int idx, u32 bat)
{
char str[64];
sprintf(str, "DBAT%c%c = 0x%08x\n",
(char)((idx - DBAT0U) / 2) + '0', (idx & 1) ? 'L' : 'U', bat);
ppc_md.progress(str, 0);
}
#define DUMP_DBAT(x) \
do { \
u32 __temp = mfspr(x);\
print_dbat(x, __temp); \
} while (0)
static void dump_dbats(void)
{
if (ppc_md.progress) {
DUMP_DBAT(DBAT0U);
DUMP_DBAT(DBAT0L);
DUMP_DBAT(DBAT1U);
DUMP_DBAT(DBAT1L);
DUMP_DBAT(DBAT2U);
DUMP_DBAT(DBAT2L);
DUMP_DBAT(DBAT3U);
DUMP_DBAT(DBAT3L);
}
}
#endif
static unsigned long __init pplus_find_end_of_memory(void)
{
unsigned long total;
if (ppc_md.progress)
ppc_md.progress("pplus_find_end_of_memory", 0);
#ifdef DUMP_DBATS
dump_dbats();
#endif
total = hawk_get_mem_size(PPLUS_HAWK_SMC_BASE);
return (total);
}
static void __init pplus_map_io(void)
{
io_block_mapping(PPLUS_ISA_IO_BASE, PPLUS_ISA_IO_BASE, 0x10000000,
_PAGE_IO);
io_block_mapping(0xfef80000, 0xfef80000, 0x00080000, _PAGE_IO);
}
static void __init pplus_init2(void)
{
#ifdef CONFIG_NVRAM
request_region(PREP_NVRAM_AS0, 0x8, "nvram");
#endif
request_region(0x20, 0x20, "pic1");
request_region(0xa0, 0x20, "pic2");
request_region(0x00, 0x20, "dma1");
request_region(0x40, 0x20, "timer");
request_region(0x80, 0x10, "dma page reg");
request_region(0xc0, 0x20, "dma2");
}
/*
* Set BAT 2 to access 0x8000000 so progress messages will work and set BAT 3
* to 0xf0000000 to access Falcon/Raven or Hawk registers
*/
static __inline__ void pplus_set_bat(void)
{
/* wait for all outstanding memory accesses to complete */
mb();
/* setup DBATs */
mtspr(SPRN_DBAT2U, 0x80001ffe);
mtspr(SPRN_DBAT2L, 0x8000002a);
mtspr(SPRN_DBAT3U, 0xf0001ffe);
mtspr(SPRN_DBAT3L, 0xf000002a);
/* wait for updates */
mb();
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
/* Map in board regs, etc. */
pplus_set_bat();
isa_io_base = PREP_ISA_IO_BASE;
isa_mem_base = PREP_ISA_MEM_BASE;
pci_dram_offset = PREP_PCI_DRAM_OFFSET;
ISA_DMA_THRESHOLD = 0x00ffffff;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
ppc_md.setup_arch = pplus_setup_arch;
ppc_md.show_cpuinfo = pplus_show_cpuinfo;
ppc_md.irq_canonicalize = pplus_irq_canonicalize;
ppc_md.init_IRQ = pplus_init_IRQ;
/* this gets changed later on if we have an OpenPIC -- Cort */
ppc_md.get_irq = i8259_irq;
ppc_md.init = pplus_init2;
ppc_md.restart = pplus_restart;
ppc_md.power_off = pplus_power_off;
ppc_md.halt = pplus_halt;
TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
PREP_NVRAM_DATA, 8);
ppc_md.time_init = todc_time_init;
ppc_md.set_rtc_time = todc_set_rtc_time;
ppc_md.get_rtc_time = todc_get_rtc_time;
ppc_md.calibrate_decr = todc_calibrate_decr;
ppc_md.nvram_read_val = todc_m48txx_read_val;
ppc_md.nvram_write_val = todc_m48txx_write_val;
ppc_md.find_end_of_memory = pplus_find_end_of_memory;
ppc_md.setup_io_mappings = pplus_map_io;
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
ppc_ide_md.default_irq = pplus_ide_default_irq;
ppc_ide_md.default_io_base = pplus_ide_default_io_base;
ppc_ide_md.ide_init_hwif = pplus_ide_init_hwif_ports;
#endif
#ifdef CONFIG_SERIAL_TEXT_DEBUG
ppc_md.progress = gen550_progress;
#endif /* CONFIG_SERIAL_TEXT_DEBUG */
#ifdef CONFIG_KGDB
ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
#endif
#ifdef CONFIG_SMP
ppc_md.smp_ops = &pplus_smp_ops;
#endif /* CONFIG_SMP */
}
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