167 lines
4.9 KiB
C
167 lines
4.9 KiB
C
/*
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* Copyright 2000 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* Updates to 2.6, Pete Popov, Embedded Alley Solutions, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <asm/cpu.h>
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#include <asm/bootinfo.h>
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#include <asm/irq.h>
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#include <asm/mipsregs.h>
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#include <asm/reboot.h>
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#include <asm/pgtable.h>
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#include <asm/time.h>
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#include <au1000.h>
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#include <prom.h>
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extern void __init board_setup(void);
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extern void au1000_restart(char *);
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extern void au1000_halt(void);
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extern void au1000_power_off(void);
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extern void au1x_time_init(void);
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extern void au1x_timer_setup(struct irqaction *irq);
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extern void set_cpuspec(void);
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void __init plat_mem_setup(void)
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{
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struct cpu_spec *sp;
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char *argptr;
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unsigned long prid, cpupll, bclk = 1;
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set_cpuspec();
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sp = cur_cpu_spec[0];
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board_setup(); /* board specific setup */
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prid = read_c0_prid();
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cpupll = (au_readl(0xB1900060) & 0x3F) * 12;
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printk("(PRId %08lx) @ %ldMHZ\n", prid, cpupll);
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bclk = sp->cpu_bclk;
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if (bclk)
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{
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/* Enable BCLK switching */
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bclk = au_readl(0xB190003C);
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au_writel(bclk | 0x60, 0xB190003C);
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printk("BCLK switching enabled!\n");
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}
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if (sp->cpu_od) {
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/* Various early Au1000 Errata corrected by this */
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set_c0_config(1<<19); /* Set Config[OD] */
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}
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else {
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/* Clear to obtain best system bus performance */
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clear_c0_config(1<<19); /* Clear Config[OD] */
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}
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argptr = prom_getcmdline();
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#ifdef CONFIG_SERIAL_8250_CONSOLE
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if ((argptr = strstr(argptr, "console=")) == NULL) {
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argptr = prom_getcmdline();
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strcat(argptr, " console=ttyS0,115200");
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}
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#endif
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#ifdef CONFIG_FB_AU1100
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if ((argptr = strstr(argptr, "video=")) == NULL) {
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argptr = prom_getcmdline();
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/* default panel */
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/*strcat(argptr, " video=au1100fb:panel:Sharp_320x240_16");*/
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}
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#endif
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#if defined(CONFIG_SOUND_AU1X00) && !defined(CONFIG_SOC_AU1000)
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/* au1000 does not support vra, au1500 and au1100 do */
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strcat(argptr, " au1000_audio=vra");
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argptr = prom_getcmdline();
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#endif
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_machine_restart = au1000_restart;
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_machine_halt = au1000_halt;
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pm_power_off = au1000_power_off;
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/* IO/MEM resources. */
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set_io_port_base(0);
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ioport_resource.start = IOPORT_RESOURCE_START;
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ioport_resource.end = IOPORT_RESOURCE_END;
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iomem_resource.start = IOMEM_RESOURCE_START;
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iomem_resource.end = IOMEM_RESOURCE_END;
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while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_E0S);
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au_writel(SYS_CNTRL_E0 | SYS_CNTRL_EN0, SYS_COUNTER_CNTRL);
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au_sync();
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while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_T0S);
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au_writel(0, SYS_TOYTRIM);
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}
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#if defined(CONFIG_64BIT_PHYS_ADDR)
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/* This routine should be valid for all Au1x based boards */
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phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
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{
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/* Don't fixup 36 bit addresses */
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if ((phys_addr >> 32) != 0)
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return phys_addr;
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#ifdef CONFIG_PCI
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{
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u32 start = (u32)Au1500_PCI_MEM_START;
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u32 end = (u32)Au1500_PCI_MEM_END;
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/* Check for PCI memory window */
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if (phys_addr >= start && (phys_addr + size - 1) <= end)
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return (phys_t)
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((phys_addr - start) + Au1500_PCI_MEM_START);
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}
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#endif
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/* All Au1x SOCs have a pcmcia controller */
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/* We setup our 32 bit pseudo addresses to be equal to the
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* 36 bit addr >> 4, to make it easier to check the address
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* and fix it.
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* The Au1x socket 0 phys attribute address is 0xF 4000 0000.
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* The pseudo address we use is 0xF400 0000. Any address over
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* 0xF400 0000 is a pcmcia pseudo address.
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*/
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if ((phys_addr >= 0xF4000000) && (phys_addr < 0xFFFFFFFF)) {
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return (phys_t)(phys_addr << 4);
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}
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/* default nop */
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return phys_addr;
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}
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EXPORT_SYMBOL(__fixup_bigphys_addr);
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#endif
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