From 1385617929e09545f9858785ea3dc1068fedfde1 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 5 Jun 2001 23:24:07 +0000 Subject: Support 512mb RAM configuration for Momenco Ocelot. Patch from David Woodhouse (dwmw2@infradead.org). --- arch/mips/gt64120/momenco_ocelot/setup.c | 203 +++++++++++++++++++++++++++++-- 1 file changed, 196 insertions(+), 7 deletions(-) (limited to 'arch/mips/gt64120/momenco_ocelot/setup.c') diff --git a/arch/mips/gt64120/momenco_ocelot/setup.c b/arch/mips/gt64120/momenco_ocelot/setup.c index 0ffc8c317..f08f32074 100644 --- a/arch/mips/gt64120/momenco_ocelot/setup.c +++ b/arch/mips/gt64120/momenco_ocelot/setup.c @@ -6,6 +6,8 @@ * * Copyright (C) 1996, 1997, 2001 Ralf Baechle * Copyright (C) 2000 RidgeRun, Inc. + * Copyright (C) 2001 Red Hat, Inc. + * * Author: RidgeRun, Inc. * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com * @@ -43,6 +45,8 @@ #include #include #include +#include +#include #include #include #include @@ -57,10 +61,13 @@ #include #include #include +#include "ocelot_pld.h" extern struct rtc_ops no_rtc_ops; struct rtc_ops *rtc_ops; +unsigned long gt64120_base = KSEG1ADDR(GT_DEF_BASE); + /* These functions are used for rebooting or halting the machine*/ extern void momenco_ocelot_restart(char *command); extern void momenco_ocelot_halt(void); @@ -68,20 +75,22 @@ extern void momenco_ocelot_power_off(void); char arcs_cmdline[COMMAND_LINE_SIZE]= { ""/*console=ttyS0,9600"*/ }; -void (*board_time_init) (struct irqaction * irq); - extern void gt64120_time_init(void); extern void momenco_ocelot_irq_setup(void); -void momenco_ocelot_setup(void) -{ - unsigned int i, j; +static char reset_reason; + +#define ENTRYLO(x) ((pte_val(mk_pte_phys((x), PAGE_KERNEL_UNCACHED)) >> 6)|1) + +static void __init setup_l3cache(unsigned long size); +void __init momenco_ocelot_setup(void) +{ + void (*l3func)(unsigned long)=KSEG1ADDR(&setup_l3cache); + unsigned int tmpword; irq_setup = momenco_ocelot_irq_setup; board_time_init = gt64120_time_init; - mips_io_port_base = KSEG1; - _machine_restart = momenco_ocelot_restart; _machine_halt = momenco_ocelot_halt; _machine_power_off = momenco_ocelot_power_off; @@ -92,4 +101,184 @@ void momenco_ocelot_setup(void) * initrd_below_start_ok = 1; */ rtc_ops = &no_rtc_ops; + + + /* A wired TLB entry for the GT64120A and the serial port. The + GT64120A is going to be hit on every IRQ anyway - there's + absolutely no point in letting it be a random TLB entry, as + it'll just cause needless churning of the TLB. And we use + the other half for the serial port, which is just a PITA + otherwise :) + + Device Physical Virtual + GT64120 Internal Regs 0x24000000 0xe0000000 + UARTs (CS2) 0x2d000000 0xe0001000 + */ + add_wired_entry(ENTRYLO(0x24000000), ENTRYLO(0x2D000000), 0xe0000000, PM_4K); + + /* Also a temporary entry to let us talk to the Ocelot PLD and NVRAM + in the CS[012] region. We can't use ioremap() yet. The NVRAM + appears to be one of the variants of ST M48T35 - see + http://www.st.com/stonline/bin/sftab.exe?table=172&filter0=M48T35 + + Ocelot PLD (CS0) 0x2c000000 0xe0020000 + NVRAM 0x2c800000 0xe0030000 + */ + + add_temporary_entry(ENTRYLO(0x2C000000), ENTRYLO(0x2d000000), 0xe0020000, PM_64K); + + + /* Relocate the CS3/BootCS region */ + GT_WRITE( GT_CS3BOOTLD_OFS, 0x2f000000 >> 21); + + /* Relocate CS[012] */ + GT_WRITE(GT_CS20LD_OFS, 0x2c000000 >> 21); + + /* Relocate the GT64120A itself... */ + GT_WRITE(GT_ISD_OFS, 0x24000000 >> 21); + mb(); + gt64120_base = 0xe0000000; + + /* ...and the PCI0 view of it. */ + GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000020); + GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x24000000); + GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000024); + GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x24000001); + + /* Relocate PCI0 I/O and Mem0 */ + GT_WRITE(GT_PCI0IOLD_OFS, 0x20000000 >> 21); + GT_WRITE(GT_PCI0M0LD_OFS, 0x22000000 >> 21); + + /* Relocate PCI0 Mem1 */ + GT_WRITE(GT_PCI0M1LD_OFS, 0x36000000 >> 21); + + /* Relocate all the PCI1 stuff, not that we use it */ + GT_WRITE(GT_PCI1IOLD_OFS, 0x30000000 >> 21); + GT_WRITE(GT_PCI1M0LD_OFS, 0x32000000 >> 21); + GT_WRITE(GT_PCI1M1LD_OFS, 0x34000000 >> 21); + + /* Relocate the CPU's view of the RAM... */ + GT_WRITE(GT_SCS10LD_OFS, 0); + GT_WRITE(GT_SCS10HD_OFS, 0x0fe00000 >> 21); + GT_WRITE(GT_SCS32LD_OFS, 0x10000000 >> 21); + GT_WRITE(GT_SCS32HD_OFS, 0x0fe00000 >> 21); + + GT_WRITE(GT_SCS1LD_OFS, 0xff); + GT_WRITE(GT_SCS1HD_OFS, 0x00); + GT_WRITE(GT_SCS0LD_OFS, 0); + GT_WRITE(GT_SCS0HD_OFS, 0xff); + GT_WRITE(GT_SCS3LD_OFS, 0xff); + GT_WRITE(GT_SCS3HD_OFS, 0x00); + GT_WRITE(GT_SCS2LD_OFS, 0); + GT_WRITE(GT_SCS2HD_OFS, 0xff); + + /* ...and the PCI0 view of it. */ + GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000010); + GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x00000000); + GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000014); + GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x10000000); + GT_WRITE(GT_PCI0_BS_SCS10_OFS, 0x0ffff000); + GT_WRITE(GT_PCI0_BS_SCS32_OFS, 0x0ffff000); + + tmpword = OCELOT_PLD_READ(BOARDREV); + if (tmpword < 26) + printk("Momenco Ocelot: Board Assembly Rev. %c\n", 'A'+tmpword); + else + printk("Momenco Ocelot: Board Assembly Revision #0x%x\n", tmpword); + + tmpword = OCELOT_PLD_READ(PLD1_ID); + printk("PLD 1 ID: %d.%d\n", tmpword>>4, tmpword&15); + tmpword = OCELOT_PLD_READ(PLD2_ID); + printk("PLD 2 ID: %d.%d\n", tmpword>>4, tmpword&15); + tmpword = OCELOT_PLD_READ(RESET_STATUS); + printk("Reset reason: 0x%x\n", tmpword); + reset_reason = tmpword; + OCELOT_PLD_WRITE(0xff, RESET_STATUS); + + tmpword = OCELOT_PLD_READ(BOARD_STATUS); + printk("Board Status register: 0x%02x\n", tmpword); + printk(" - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent"); + printk(" - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent"); + printk(" - Tulip PHY %s connected\n", (tmpword&0x10)?"is":"not"); + printk(" - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1); + printk(" - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3))); + + if (tmpword&12) + l3func((1<<(((tmpword&12) >> 2)+20))); + + switch(tmpword &3) { + case 3: + /* 512MiB */ + add_memory_region(256<<20, 256<<20, BOOT_MEM_RAM); + case 2: + /* 256MiB */ + /* FIXME: Is it actually here, or at 0x10000000? */ + add_memory_region(128<<20, 128<<20, BOOT_MEM_RAM); + case 1: + /* 128MiB */ + add_memory_region(64<<20, 64<<20, BOOT_MEM_RAM); + case 0: + /* 64MiB */ + ; + } + + /* Fix up the DiskOnChip mapping */ + GT_WRITE(0x468, 0xfef73); } + +extern int rm7k_tcache_enabled; +/* + * This runs in KSEG1. See the verbiage in rm7k.c::probe_scache() + */ +#define Page_Invalidate_T 0x16 +static void __init setup_l3cache(unsigned long size) +{ + int register i; + unsigned long tmp; + + printk("Enabling L3 cache..."); + + /* Enable the L3 cache in the GT64120A's CPU Configuration register */ + GT_READ(0, &tmp); + GT_WRITE(0, tmp | (1<<14)); + + /* Enable the L3 cache in the CPU */ + set_cp0_config(1<<12 /* CONF_TE */); + + /* Clear the cache */ + set_taglo(0); + set_taghi(0); + + for (i=0; i < size; i+= 4096) { + __asm__ __volatile__ ( + ".set noreorder\n\t" + ".set mips3\n\t" + "cache %1, (%0)\n\t" + ".set mips0\n\t" + ".set reorder" + : + : "r" (KSEG0ADDR(i)), + "i" (Page_Invalidate_T)); + } + + /* Let the RM7000 MM code know that the tertiary cache is enabled */ + rm7k_tcache_enabled = 1; + + printk("Done\n"); +} + + +/* This needs to be one of the first initcalls, because no I/O port access + can work before this */ + +static int io_base_ioremap(void) +{ + void *io_remap_range = ioremap(GT_PCI_IO_BASE, GT_PCI_IO_SIZE); + if (!io_remap_range) { + panic("Could not ioremap I/O port range\n"); + } + mips_io_port_base = io_remap_range - GT_PCI_IO_BASE; + return 0; +} +module_init(io_base_ioremap); + -- cgit v1.2.3