NetBSD-5.0.2/sys/arch/evbarm/nslu2/nslu2_machdep.c
/* $NetBSD: nslu2_machdep.c,v 1.7 2008/04/28 20:23:17 martin Exp $ */
/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Steve C. Woodford.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 2003
* Ichiro FUKUHARA <ichiro@ichiro.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ichiro FUKUHARA.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``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 ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD 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.
*/
/*
* Copyright (c) 1997,1998 Mark Brinicombe.
* Copyright (c) 1997,1998 Causality Limited.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe
* for the NetBSD Project.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 OR CONTRIBUTORS 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.
*/
/*
* Machine dependant functions for kernel setup for Linksys NSLU2
* using RedBoot firmware.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nslu2_machdep.c,v 1.7 2008/04/28 20:23:17 martin Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "opt_pmap_debug.h"
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/exec.h>
#include <sys/proc.h>
#include <sys/msgbuf.h>
#include <sys/reboot.h>
#include <sys/termios.h>
#include <sys/ksyms.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <machine/bootconfig.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/frame.h>
#include <arm/undefined.h>
#include <arm/arm32/machdep.h>
#include <arm/xscale/ixp425reg.h>
#include <arm/xscale/ixp425var.h>
#include <arm/xscale/ixp425_sipvar.h>
#include <evbarm/nslu2/nslu2reg.h>
#include "com.h"
#if NCOM > 0
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#endif
#include "ksyms.h"
/* Kernel text starts 2MB in from the bottom of the kernel address space. */
#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
/*
* The range 0xc1000000 - 0xccffffff is available for kernel VM space
* Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
*/
#define KERNEL_VM_SIZE 0x0C000000
/*
* Address to call from cpu_reset() to reset the machine.
* This is machine architecture dependant as it varies depending
* on where the ROM appears when you turn the MMU off.
*/
u_int cpu_reset_address = 0x00000000;
/* Define various stack sizes in pages */
#define IRQ_STACK_SIZE 1
#define ABT_STACK_SIZE 1
#define UND_STACK_SIZE 1
BootConfig bootconfig; /* Boot config storage */
char *boot_args = NULL;
char *boot_file = NULL;
vm_offset_t physical_start;
vm_offset_t physical_freestart;
vm_offset_t physical_freeend;
vm_offset_t physical_end;
u_int free_pages;
vm_offset_t pagetables_start;
int physmem = 0;
/* Physical and virtual addresses for some global pages */
pv_addr_t irqstack;
pv_addr_t undstack;
pv_addr_t abtstack;
pv_addr_t kernelstack;
pv_addr_t minidataclean;
vm_offset_t msgbufphys;
extern u_int data_abort_handler_address;
extern u_int prefetch_abort_handler_address;
extern u_int undefined_handler_address;
extern int end;
#ifdef PMAP_DEBUG
extern int pmap_debug_level;
#endif
#define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
#define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
#define KERNEL_PT_KERNEL_NUM 4
#define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
/* L2 tables for mapping kernel VM */
#define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1)
#define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
struct user *proc0paddr;
/* Prototypes */
void consinit(void);
u_int cpu_get_control __P((void));
/*
* Define the default console speed for the board. This is generally
* what the firmware provided with the board defaults to.
*/
#ifndef CONSPEED
#define CONSPEED B115200
#endif /* ! CONSPEED */
#ifndef CONUNIT
#define CONUNIT 0
#endif
#ifndef CONMODE
#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */
#endif
int comcnspeed = CONSPEED;
int comcnmode = CONMODE;
int comcnunit = CONUNIT;
#if KGDB
#ifndef KGDB_DEVNAME
#error Must define KGDB_DEVNAME
#endif
const char kgdb_devname[] = KGDB_DEVNAME;
#ifndef KGDB_DEVADDR
#error Must define KGDB_DEVADDR
#endif
unsigned long kgdb_devaddr = KGDB_DEVADDR;
#ifndef KGDB_DEVRATE
#define KGDB_DEVRATE CONSPEED
#endif
int kgdb_devrate = KGDB_DEVRATE;
#ifndef KGDB_DEVMODE
#define KGDB_DEVMODE CONMODE
#endif
int kgdb_devmode = KGDB_DEVMODE;
#endif /* KGDB */
/*
* void cpu_reboot(int howto, char *bootstr)
*
* Reboots the system
*
* Deal with any syncing, unmounting, dumping and shutdown hooks,
* then reset the CPU.
*/
void
cpu_reboot(int howto, char *bootstr)
{
#ifdef DIAGNOSTIC
/* info */
printf("boot: howto=%08x curproc=%p\n", howto, curproc);
#endif
/*
* If we are still cold then hit the air brakes
* and crash to earth fast
*/
if (cold) {
doshutdownhooks();
printf("The operating system has halted.\n");
printf("Please press any key to reboot.\n\n");
cngetc();
goto reset;
}
/* Disable console buffering */
/*
* If RB_NOSYNC was not specified sync the discs.
* Note: Unless cold is set to 1 here, syslogd will die during the
* unmount. It looks like syslogd is getting woken up only to find
* that it cannot page part of the binary in as the filesystem has
* been unmounted.
*/
if (!(howto & RB_NOSYNC))
bootsync();
/* Say NO to interrupts */
splhigh();
/* Do a dump if requested. */
if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
dumpsys();
/* Run any shutdown hooks */
doshutdownhooks();
/* Make sure IRQ's are disabled */
IRQdisable;
if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) {
printf("The operating system has halted.\n");
printf("Please press any key to reboot.\n\n");
cngetc();
}
reset:
/*
* Make really really sure that all interrupts are disabled,
*/
(void) disable_interrupts(I32_bit | F32_bit);
if (howto & RB_POWERDOWN) {
uint32_t reg;
printf("powering down...\n\r");
/* Delay to allow the UART's Tx FIFO to drain */
delay(50000);
#define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r)))
#define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v)
/*
* Power-down pin requires a short pulse
*/
reg = GPRD(IXP425_GPIO_GPOUTR);
reg |= 1u << GPIO_POWER_OFF;
GPWR(IXP425_GPIO_GPOUTR, reg);
delay(1000);
reg = GPRD(IXP425_GPIO_GPOUTR);
reg &= ~(1u << GPIO_POWER_OFF);
GPWR(IXP425_GPIO_GPOUTR, reg);
delay(500000);
printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r");
}
printf("rebooting...\n\r");
#define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v)
/* Force a watchdog reset */
WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA);
WDWR(IXP425_OST_WDOG, 0x1000);
WDWR(IXP425_OST_WDOG_ENAB,
OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA);
delay(500000);
/* ...and if that didn't work, just croak. */
printf("RESET FAILED!\n");
for (;;);
}
/* Static device mappings. */
static const struct pmap_devmap nslu2_devmap[] = {
/* Physical/Virtual address for I/O space */
{
IXP425_IO_VBASE,
IXP425_IO_HWBASE,
IXP425_IO_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
/* Expansion Bus */
{
IXP425_EXP_VBASE,
IXP425_EXP_HWBASE,
IXP425_EXP_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
/* IXP425 PCI Configuration */
{
IXP425_PCI_VBASE,
IXP425_PCI_HWBASE,
IXP425_PCI_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
/* SDRAM Controller */
{
IXP425_MCU_VBASE,
IXP425_MCU_HWBASE,
IXP425_MCU_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
/* PCI Memory Space */
{
IXP425_PCI_MEM_VBASE,
IXP425_PCI_MEM_HWBASE,
IXP425_PCI_MEM_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
/* Flash memory */
{
NSLU2_FLASH_VBASE,
NSLU2_FLASH_HWBASE,
NSLU2_FLASH_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
{
0,
0,
0,
0,
0,
}
};
/*
* u_int initarm(...)
*
* Initial entry point on startup. This gets called before main() is
* entered.
* It should be responsible for setting up everything that must be
* in place when main is called.
* This includes
* Taking a copy of the boot configuration structure.
* Initialising the physical console so characters can be printed.
* Setting up page tables for the kernel
* Relocating the kernel to the bottom of physical memory
*/
u_int
initarm(void *arg)
{
extern vaddr_t xscale_cache_clean_addr;
#ifdef DIAGNOSTIC
extern vsize_t xscale_minidata_clean_size;
#endif
int loop;
int loop1;
u_int kerneldatasize;
u_int l1pagetable;
u_int freemempos;
uint32_t reg;
/*
* Make sure the power-down GPIO pin is configured correctly, as
* cpu_reboot() may be called early on (e.g. from within ddb(9)).
*/
/* Pin is active-high, so make sure it's driven low */
reg = GPRD(IXP425_GPIO_GPOUTR);
reg &= ~(1u << GPIO_POWER_OFF);
GPWR(IXP425_GPIO_GPOUTR, reg);
/* Set as output */
reg = GPRD(IXP425_GPIO_GPOER);
reg &= ~(1u << GPIO_POWER_OFF);
GPWR(IXP425_GPIO_GPOER, reg);
/*
* Since we map v0xf0000000 == p0xc8000000, it's possible for
* us to initialize the console now.
*/
consinit();
#ifdef VERBOSE_INIT_ARM
/* Talk to the user */
printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n");
#endif
/*
* Heads up ... Setup the CPU / MMU / TLB functions
*/
if (set_cpufuncs())
panic("cpu not recognized!");
/* XXX overwrite bootconfig to hardcoded values */
bootconfig.dramblocks = 1;
bootconfig.dram[0].address = 0x10000000;
bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE;
kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE;
#ifdef VERBOSE_INIT_ARM
printf("kernsize=0x%x\n", kerneldatasize);
#endif
kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;
/*
* Set up the variables that define the availablilty of
* physical memory. For now, we're going to set
* physical_freestart to 0x10200000 (where the kernel
* was loaded), and allocate the memory we need downwards.
* If we get too close to the L1 table that we set up, we
* will panic. We will update physical_freestart and
* physical_freeend later to reflect what pmap_bootstrap()
* wants to see.
*
* XXX pmap_bootstrap() needs an enema.
*/
physical_start = bootconfig.dram[0].address;
physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
physical_freestart = physical_start
+ (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
physical_freeend = physical_end;
physmem = (physical_end - physical_start) / PAGE_SIZE;
/* Tell the user about the memory */
#ifdef VERBOSE_INIT_ARM
printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
physical_start, physical_end - 1);
printf("Allocating page tables\n");
#endif
free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
freemempos = 0x10000000;
#ifdef VERBOSE_INIT_ARM
printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
physical_start, physical_end);
#endif
/* Define a macro to simplify memory allocation */
#define valloc_pages(var, np) \
alloc_pages((var).pv_pa, (np)); \
(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
#if 0
#define alloc_pages(var, np) \
physical_freeend -= ((np) * PAGE_SIZE); \
if (physical_freeend < physical_freestart) \
panic("initarm: out of memory"); \
(var) = physical_freeend; \
free_pages -= (np); \
memset((char *)(var), 0, ((np) * PAGE_SIZE));
#else
#define alloc_pages(var, np) \
(var) = freemempos; \
memset((char *)(var), 0, ((np) * PAGE_SIZE)); \
freemempos += (np) * PAGE_SIZE;
#endif
loop1 = 0;
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
/* Are we 16KB aligned for an L1 ? */
if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
&& kernel_l1pt.pv_pa == 0) {
valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
} else {
valloc_pages(kernel_pt_table[loop1],
L2_TABLE_SIZE / PAGE_SIZE);
++loop1;
}
}
/* This should never be able to happen but better confirm that. */
if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
panic("initarm: Failed to align the kernel page directory");
/*
* Allocate a page for the system page.
* This page will just contain the system vectors and can be
* shared by all processes.
*/
alloc_pages(systempage.pv_pa, 1);
/* Allocate stacks for all modes */
valloc_pages(irqstack, IRQ_STACK_SIZE);
valloc_pages(abtstack, ABT_STACK_SIZE);
valloc_pages(undstack, UND_STACK_SIZE);
valloc_pages(kernelstack, UPAGES);
/* Allocate enough pages for cleaning the Mini-Data cache. */
KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
valloc_pages(minidataclean, 1);
#ifdef VERBOSE_INIT_ARM
printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
irqstack.pv_va);
printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
abtstack.pv_va);
printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
undstack.pv_va);
printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
kernelstack.pv_va);
#endif
/*
* XXX Defer this to later so that we can reclaim the memory
* XXX used by the RedBoot page tables.
*/
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
/*
* Ok we have allocated physical pages for the primary kernel
* page tables
*/
#ifdef VERBOSE_INIT_ARM
printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif
/*
* Now we start construction of the L1 page table
* We start by mapping the L2 page tables into the L1.
* This means that we can replace L1 mappings later on if necessary
*/
l1pagetable = kernel_l1pt.pv_pa;
/* Map the L2 pages tables in the L1 page table */
pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
&kernel_pt_table[KERNEL_PT_SYS]);
for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
&kernel_pt_table[KERNEL_PT_KERNEL + loop]);
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
&kernel_pt_table[KERNEL_PT_VMDATA + loop]);
/* update the top of the kernel VM */
pmap_curmaxkvaddr =
KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
&kernel_pt_table[KERNEL_PT_IO]);
#ifdef VERBOSE_INIT_ARM
printf("Mapping kernel\n");
#endif
/* Now we fill in the L2 pagetable for the kernel static code/data */
{
extern char etext[], _end[];
size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
u_int logical;
textsize = (textsize + PGOFSET) & ~PGOFSET;
totalsize = (totalsize + PGOFSET) & ~PGOFSET;
logical = 0x00200000; /* offset of kernel in RAM */
logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
physical_start + logical, textsize,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
physical_start + logical, totalsize - textsize,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
}
#ifdef VERBOSE_INIT_ARM
printf("Constructing L2 page tables\n");
#endif
/* Map the stack pages */
pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
}
/* Map the Mini-Data cache clean area. */
xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
minidataclean.pv_pa);
/* Map the vector page. */
pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
/*
* Map the IXP425 registers
*/
pmap_devmap_bootstrap(l1pagetable, nslu2_devmap);
/*
* Give the XScale global cache clean code an appropriately
* sized chunk of unmapped VA space starting at 0xff000000
* (our device mappings end before this address).
*/
xscale_cache_clean_addr = 0xff000000U;
/*
* Now we have the real page tables in place so we can switch to them.
* Once this is done we will be running with the REAL kernel page
* tables.
*/
/*
* Update the physical_freestart/physical_freeend/free_pages
* variables.
*/
{
extern char _end[];
physical_freestart = physical_start +
(((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
KERNEL_BASE);
physical_freeend = physical_end;
free_pages =
(physical_freeend - physical_freestart) / PAGE_SIZE;
}
/* Switch tables */
#ifdef VERBOSE_INIT_ARM
printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
physical_freestart, free_pages, free_pages);
printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
#endif
cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
setttb(kernel_l1pt.pv_pa);
cpu_tlb_flushID();
cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
/*
* Moved from cpu_startup() as data_abort_handler() references
* this during uvm init
*/
proc0paddr = (struct user *)kernelstack.pv_va;
lwp0.l_addr = proc0paddr;
#ifdef VERBOSE_INIT_ARM
printf("bootstrap done.\n");
#endif
arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
/*
* Pages were allocated during the secondary bootstrap for the
* stacks for different CPU modes.
* We must now set the r13 registers in the different CPU modes to
* point to these stacks.
* Since the ARM stacks use STMFD etc. we must set r13 to the top end
* of the stack memory.
*/
#ifdef VERBOSE_INIT_ARM
printf("init subsystems: stacks ");
#endif
set_stackptr(PSR_IRQ32_MODE,
irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
set_stackptr(PSR_ABT32_MODE,
abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
set_stackptr(PSR_UND32_MODE,
undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
/*
* Well we should set a data abort handler.
* Once things get going this will change as we will need a proper
* handler.
* Until then we will use a handler that just panics but tells us
* why.
* Initialisation of the vectors will just panic on a data abort.
* This just fills in a slightly better one.
*/
#ifdef VERBOSE_INIT_ARM
printf("vectors ");
#endif
data_abort_handler_address = (u_int)data_abort_handler;
prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
undefined_handler_address = (u_int)undefinedinstruction_bounce;
/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
printf("undefined ");
#endif
undefined_init();
/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
printf("page ");
#endif
uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
atop(physical_freestart), atop(physical_freeend),
VM_FREELIST_DEFAULT);
/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
printf("pmap ");
#endif
pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
printf("irq ");
#endif
ixp425_intr_init();
#ifdef VERBOSE_INIT_ARM
printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n");
#endif
#ifdef BOOTHOWTO
boothowto = BOOTHOWTO;
#endif
#if NKSYMS || defined(DDB) || defined(LKM)
/* Firmware doesn't load symbols. */
ksyms_init(0, NULL, NULL);
#endif
#ifdef DDB
db_machine_init();
if (boothowto & RB_KDB)
Debugger();
#endif
/* We return the new stack pointer address */
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
/*
* consinit
*/
void
consinit(void)
{
static int consinit_called;
static const bus_addr_t addrs[2] = {
IXP425_UART0_HWBASE, IXP425_UART1_HWBASE
};
if (consinit_called != 0)
return;
consinit_called = 1;
pmap_devmap_register(nslu2_devmap);
if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit],
comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode))
panic("can't init serial console (UART%d)", comcnunit);
}