/* * BRIEF MODULE DESCRIPTION * Momentum Computer Ocelot-G (CP7000G) - board dependent boot routines * * Copyright (C) 1996, 1997, 2001 Ralf Baechle * Copyright (C) 2000 RidgeRun, Inc. * Copyright (C) 2001 Red Hat, Inc. * Copyright (C) 2002 Momentum Computer * * Author: Matthew Dharm, Momentum Computer * mdharm@momenco.com * * Author: RidgeRun, Inc. * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com * * Copyright 2001 MontaVista Software Inc. * Author: jsun@mvista.com or jsun@junsun.net * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ocelot_pld.h" #ifdef CONFIG_GALILLEO_GT64240_ETH extern unsigned char prom_mac_addr_base[6]; #endif unsigned long marvell_base; /* These functions are used for rebooting or halting the machine*/ extern void momenco_ocelot_restart(char *command); extern void momenco_ocelot_halt(void); extern void momenco_ocelot_power_off(void); extern void gt64240_time_init(void); extern void momenco_ocelot_irq_setup(void); static char reset_reason; static unsigned long ENTRYLO(unsigned long paddr) { return ((paddr & PAGE_MASK) | (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)) >> 6; } /* setup code for a handoff from a version 2 PMON 2000 PROM */ void PMON_v2_setup(void) { /* A wired TLB entry for the GT64240 and the serial port. The GT64240 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 GT64240 Internal Regs 0xf4000000 0xe0000000 UARTs (CS2) 0xfd000000 0xe0001000 */ add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K); add_wired_entry(ENTRYLO(0xfd000000), ENTRYLO(0xfd001000), 0xfd000000, 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 is a ST M48T37Y, which includes NVRAM, RTC, and Watchdog functions. Ocelot PLD (CS0) 0xfc000000 0xe0020000 NVRAM (CS1) 0xfc800000 0xe0030000 */ add_temporary_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfc010000), 0xfc000000, PM_64K); add_temporary_entry(ENTRYLO(0xfc800000), ENTRYLO(0xfc810000), 0xfc800000, PM_64K); marvell_base = 0xf4000000; } 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; printk("Enabling L3 cache..."); /* Enable the L3 cache in the GT64120A's CPU Configuration register */ MV_WRITE(0, MV_READ(0) | (1<<14)); /* Enable the L3 cache in the CPU */ set_c0_config(1<<12 /* CONF_TE */); /* Clear the cache */ write_c0_taglo(0); write_c0_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"); } void __init plat_setup(void) { void (*l3func)(unsigned long) = (void *) KSEG1ADDR(setup_l3cache); unsigned int tmpword; board_time_init = gt64240_time_init; _machine_restart = momenco_ocelot_restart; _machine_halt = momenco_ocelot_halt; pm_power_off = momenco_ocelot_power_off; /* * initrd_start = (ulong)ocelot_initrd_start; * initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size; * initrd_below_start_ok = 1; */ /* do handoff reconfiguration */ PMON_v2_setup(); #ifdef CONFIG_GALILLEO_GT64240_ETH /* get the mac addr */ memcpy(prom_mac_addr_base, (void*)0xfc807cf2, 6); #endif /* Turn off the Bit-Error LED */ OCELOT_PLD_WRITE(0x80, INTCLR); tmpword = OCELOT_PLD_READ(BOARDREV); if (tmpword < 26) printk("Momenco Ocelot-G: Board Assembly Rev. %c\n", 'A'+tmpword); else printk("Momenco Ocelot-G: 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 -- two banks of 256MiB */ add_memory_region( 0x0<<20, 0x100<<20, BOOT_MEM_RAM); /* add_memory_region(0x100<<20, 0x100<<20, BOOT_MEM_RAM); */ break; case 2: /* 256MiB -- two banks of 128MiB */ add_memory_region( 0x0<<20, 0x80<<20, BOOT_MEM_RAM); add_memory_region(0x80<<20, 0x80<<20, BOOT_MEM_RAM); break; case 1: /* 128MiB -- 64MiB per bank */ add_memory_region( 0x0<<20, 0x40<<20, BOOT_MEM_RAM); add_memory_region(0x40<<20, 0x40<<20, BOOT_MEM_RAM); break; case 0: /* 64MiB */ add_memory_region( 0x0<<20, 0x40<<20, BOOT_MEM_RAM); break; } /* FIXME: Fix up the DiskOnChip mapping */ MV_WRITE(0x468, 0xfef73); } /* 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) { /* we're mapping PCI accesses from 0xc0000000 to 0xf0000000 */ unsigned long io_remap_range; io_remap_range = (unsigned long) ioremap(0xc0000000, 0x30000000); if (!io_remap_range) panic("Could not ioremap I/O port range"); set_io_port_base(io_remap_range - 0xc0000000); return 0; } module_init(io_base_ioremap);