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linux-sg2042/arch/mips/mti-malta/malta-init.c

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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* PROM library initialisation code.
*
* Copyright (C) 1999,2000,2004,2005,2012 MIPS Technologies, Inc.
* All rights reserved.
* Authors: Carsten Langgaard <carstenl@mips.com>
* Maciej W. Rozycki <macro@mips.com>
* Steven J. Hill <sjhill@mips.com>
*/
#include <linux/init.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/serial_8250.h>
#include <asm/cacheflush.h>
#include <asm/smp-ops.h>
#include <asm/traps.h>
#include <asm/fw/fw.h>
#include <asm/mips-cm.h>
#include <asm/mips-cpc.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/malta.h>
static int mips_revision_corid;
int mips_revision_sconid;
/* Bonito64 system controller register base. */
unsigned long _pcictrl_bonito;
unsigned long _pcictrl_bonito_pcicfg;
/* GT64120 system controller register base */
unsigned long _pcictrl_gt64120;
/* MIPS System controller register base */
unsigned long _pcictrl_msc;
#ifdef CONFIG_SERIAL_8250_CONSOLE
static void __init console_config(void)
{
char console_string[40];
int baud = 0;
char parity = '\0', bits = '\0', flow = '\0';
char *s;
s = fw_getenv("modetty0");
if (s) {
while (*s >= '0' && *s <= '9')
baud = baud*10 + *s++ - '0';
if (*s == ',')
s++;
if (*s)
parity = *s++;
if (*s == ',')
s++;
if (*s)
bits = *s++;
if (*s == ',')
s++;
if (*s == 'h')
flow = 'r';
}
if (baud == 0)
baud = 38400;
if (parity != 'n' && parity != 'o' && parity != 'e')
parity = 'n';
if (bits != '7' && bits != '8')
bits = '8';
if (flow == '\0')
flow = 'r';
if ((strstr(fw_getcmdline(), "earlycon=")) == NULL) {
sprintf(console_string, "uart8250,io,0x3f8,%d%c%c", baud,
parity, bits);
setup_early_serial8250_console(console_string);
}
if ((strstr(fw_getcmdline(), "console=")) == NULL) {
sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
parity, bits, flow);
strcat(fw_getcmdline(), console_string);
pr_info("Config serial console:%s\n", console_string);
}
}
#endif
static void __init mips_nmi_setup(void)
{
void *base;
extern char except_vec_nmi;
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa80) :
(void *)(CAC_BASE + 0x380);
memcpy(base, &except_vec_nmi, 0x80);
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
static void __init mips_ejtag_setup(void)
{
void *base;
extern char except_vec_ejtag_debug;
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa00) :
(void *)(CAC_BASE + 0x300);
memcpy(base, &except_vec_ejtag_debug, 0x80);
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
phys_t mips_cpc_default_phys_base(void)
{
return CPC_BASE_ADDR;
}
void __init prom_init(void)
{
mips_display_message("LINUX");
/*
* early setup of _pcictrl_bonito so that we can determine
* the system controller on a CORE_EMUL board
*/
_pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
mips_revision_corid = MIPS_REVISION_CORID;
if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
if (BONITO_PCIDID == 0x0001df53 ||
BONITO_PCIDID == 0x0003df53)
mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
else
mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
}
mips_revision_sconid = MIPS_REVISION_SCONID;
if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) {
switch (mips_revision_corid) {
case MIPS_REVISION_CORID_QED_RM5261:
case MIPS_REVISION_CORID_CORE_LV:
case MIPS_REVISION_CORID_CORE_FPGA:
case MIPS_REVISION_CORID_CORE_FPGAR2:
mips_revision_sconid = MIPS_REVISION_SCON_GT64120;
break;
case MIPS_REVISION_CORID_CORE_EMUL_BON:
case MIPS_REVISION_CORID_BONITO64:
case MIPS_REVISION_CORID_CORE_20K:
mips_revision_sconid = MIPS_REVISION_SCON_BONITO;
break;
case MIPS_REVISION_CORID_CORE_MSC:
case MIPS_REVISION_CORID_CORE_FPGA2:
case MIPS_REVISION_CORID_CORE_24K:
/*
* SOCit/ROCit support is essentially identical
* but make an attempt to distinguish them
*/
mips_revision_sconid = MIPS_REVISION_SCON_SOCIT;
break;
case MIPS_REVISION_CORID_CORE_FPGA3:
case MIPS_REVISION_CORID_CORE_FPGA4:
case MIPS_REVISION_CORID_CORE_FPGA5:
case MIPS_REVISION_CORID_CORE_EMUL_MSC:
default:
/* See above */
mips_revision_sconid = MIPS_REVISION_SCON_ROCIT;
break;
}
}
switch (mips_revision_sconid) {
u32 start, map, mask, data;
case MIPS_REVISION_SCON_GT64120:
/*
* Setup the North bridge to do Master byte-lane swapping
* when running in bigendian.
*/
_pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
#ifdef CONFIG_CPU_LITTLE_ENDIAN
GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
GT_PCI0_CMD_SBYTESWAP_BIT);
#else
GT_WRITE(GT_PCI0_CMD_OFS, 0);
#endif
/* Fix up PCI I/O mapping if necessary (for Atlas). */
start = GT_READ(GT_PCI0IOLD_OFS);
map = GT_READ(GT_PCI0IOREMAP_OFS);
if ((start & map) != 0) {
map &= ~start;
GT_WRITE(GT_PCI0IOREMAP_OFS, map);
}
set_io_port_base(MALTA_GT_PORT_BASE);
break;
case MIPS_REVISION_SCON_BONITO:
_pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
/*
* Disable Bonito IOBC.
*/
BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
/*
* Setup the North bridge to do Master byte-lane swapping
* when running in bigendian.
*/
#ifdef CONFIG_CPU_LITTLE_ENDIAN
BONITO_BONGENCFG = BONITO_BONGENCFG &
~(BONITO_BONGENCFG_MSTRBYTESWAP |
BONITO_BONGENCFG_BYTESWAP);
#else
BONITO_BONGENCFG = BONITO_BONGENCFG |
BONITO_BONGENCFG_MSTRBYTESWAP |
BONITO_BONGENCFG_BYTESWAP;
#endif
set_io_port_base(MALTA_BONITO_PORT_BASE);
break;
case MIPS_REVISION_SCON_SOCIT:
case MIPS_REVISION_SCON_ROCIT:
_pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
mips_pci_controller:
mb();
MSC_READ(MSC01_PCI_CFG, data);
MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
wmb();
/* Fix up lane swapping. */
#ifdef CONFIG_CPU_LITTLE_ENDIAN
MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
#else
MSC_WRITE(MSC01_PCI_SWAP,
MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
#endif
#ifndef CONFIG_EVA
/* Fix up target memory mapping. */
MSC_READ(MSC01_PCI_BAR0, mask);
MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK);
#else
/*
* Setup the Malta max (2GB) memory for PCI DMA in host bridge
* in transparent addressing mode, starting from 0x80000000.
*/
mask = PHYS_OFFSET | (1<<3);
MSC_WRITE(MSC01_PCI_BAR0, mask);
mask = PHYS_OFFSET;
MSC_WRITE(MSC01_PCI_HEAD4, mask);
MSC_WRITE(MSC01_PCI_P2SCMSKL, mask);
MSC_WRITE(MSC01_PCI_P2SCMAPL, mask);
#endif
/* Don't handle target retries indefinitely. */
if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) ==
MSC01_PCI_CFG_MAXRTRY_MSK)
data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK <<
MSC01_PCI_CFG_MAXRTRY_SHF)) |
((MSC01_PCI_CFG_MAXRTRY_MSK - 1) <<
MSC01_PCI_CFG_MAXRTRY_SHF);
wmb();
MSC_WRITE(MSC01_PCI_CFG, data);
mb();
set_io_port_base(MALTA_MSC_PORT_BASE);
break;
case MIPS_REVISION_SCON_SOCITSC:
case MIPS_REVISION_SCON_SOCITSCP:
_pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000);
goto mips_pci_controller;
default:
/* Unknown system controller */
mips_display_message("SC Error");
while (1); /* We die here... */
}
board_nmi_handler_setup = mips_nmi_setup;
board_ejtag_handler_setup = mips_ejtag_setup;
fw_init_cmdline();
fw_meminit();
#ifdef CONFIG_SERIAL_8250_CONSOLE
console_config();
#endif
/* Early detection of CMP support */
mips_cm_probe();
mips_cpc_probe();
if (!register_cps_smp_ops())
return;
if (!register_cmp_smp_ops())
return;
if (!register_vsmp_smp_ops())
return;
}
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