934 lines
25 KiB
C
934 lines
25 KiB
C
/* $NetBSD: iq80310_machdep.c,v 1.1 2001/09/05 04:53:41 matt Exp $ */
|
|
|
|
/*
|
|
* 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 EBSA285 core architecture
|
|
* using Netwinder firmware
|
|
*
|
|
* Created : 24/11/97
|
|
*/
|
|
|
|
#include "opt_ddb.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 <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 <machine/irqhandler.h>
|
|
#include <machine/pte.h>
|
|
#include <machine/undefined.h>
|
|
|
|
#include <machine/iq80310_boot.h>
|
|
#include <arm/xscale/i80312reg.h>
|
|
#include <arm/xscale/i80312var.h>
|
|
|
|
#include "opt_ipkdb.h"
|
|
|
|
#include "isa.h"
|
|
#if NISA > 0
|
|
#include <dev/isa/isareg.h>
|
|
#include <dev/isa/isavar.h>
|
|
#endif
|
|
|
|
/*
|
|
* 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 = I80312_ROM_BASE;
|
|
|
|
u_int dc21285_fclk = FCLK;
|
|
|
|
/* Define various stack sizes in pages */
|
|
#define IRQ_STACK_SIZE 1
|
|
#define ABT_STACK_SIZE 1
|
|
#ifdef IPKDB
|
|
#define UND_STACK_SIZE 2
|
|
#else
|
|
#define UND_STACK_SIZE 1
|
|
#endif
|
|
|
|
struct nwbootinfo nwbootinfo;
|
|
BootConfig bootconfig; /* Boot config storage */
|
|
static char bootargs[MAX_BOOT_STRING + 1];
|
|
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;
|
|
|
|
/*int debug_flags;*/
|
|
#ifndef PMAP_STATIC_L1S
|
|
int max_processes = 64; /* Default number */
|
|
#endif /* !PMAP_STATIC_L1S */
|
|
|
|
/* Physical and virtual addresses for some global pages */
|
|
pv_addr_t systempage;
|
|
pv_addr_t irqstack;
|
|
pv_addr_t undstack;
|
|
pv_addr_t abtstack;
|
|
pv_addr_t kernelstack;
|
|
|
|
vm_offset_t msgbufphys;
|
|
|
|
extern u_int data_abort_handler_address;
|
|
extern u_int prefetch_abort_handler_address;
|
|
extern u_int undefined_handler_address;
|
|
|
|
#ifdef PMAP_DEBUG
|
|
extern int pmap_debug_level;
|
|
#endif
|
|
|
|
#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
|
|
#define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
|
|
#define KERNEL_PT_VMDATA 2 /* Page tables for mapping kernel VM */
|
|
#define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2))
|
|
#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
|
|
|
|
pt_entry_t kernel_pt_table[NUM_KERNEL_PTS];
|
|
|
|
struct user *proc0paddr;
|
|
|
|
/* Prototypes */
|
|
|
|
void consinit __P((void));
|
|
|
|
void map_section __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa,
|
|
int cacheable));
|
|
void map_pagetable __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
|
|
void map_entry __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
|
|
void map_entry_nc __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
|
|
void map_entry_ro __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
|
|
vm_size_t map_chunk __P((vm_offset_t pd, vm_offset_t pt, vm_offset_t va,
|
|
vm_offset_t pa, vm_size_t size, u_int acc,
|
|
u_int flg));
|
|
|
|
void process_kernel_args __P((char *));
|
|
void data_abort_handler __P((trapframe_t *frame));
|
|
void prefetch_abort_handler __P((trapframe_t *frame));
|
|
void undefinedinstruction_bounce __P((trapframe_t *frame));
|
|
void zero_page_readonly __P((void));
|
|
void zero_page_readwrite __P((void));
|
|
extern void configure __P((void));
|
|
extern void db_machine_init __P((void));
|
|
extern void parse_mi_bootargs __P((char *args));
|
|
extern void dumpsys __P((void));
|
|
|
|
/* A load of console goo. */
|
|
#include "vga.h"
|
|
#if (NVGA > 0)
|
|
#include <dev/ic/mc6845reg.h>
|
|
#include <dev/ic/pcdisplayvar.h>
|
|
#include <dev/ic/vgareg.h>
|
|
#include <dev/ic/vgavar.h>
|
|
#endif
|
|
|
|
#include "pckbc.h"
|
|
#if (NPCKBC > 0)
|
|
#include <dev/ic/i8042reg.h>
|
|
#include <dev/ic/pckbcvar.h>
|
|
#endif
|
|
|
|
#include "com.h"
|
|
#if (NCOM > 0)
|
|
#include <dev/ic/comreg.h>
|
|
#include <dev/ic/comvar.h>
|
|
#ifndef CONCOMADDR
|
|
#define CONCOMADDR 0
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef CONSDEVNAME
|
|
#define CONSDEVNAME "com"
|
|
#endif
|
|
|
|
#define CONSPEED B115200
|
|
#ifndef CONSPEED
|
|
#define CONSPEED B9600 /* TTYDEF_SPEED */
|
|
#endif
|
|
#ifndef CONMODE
|
|
#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
|
|
#endif
|
|
|
|
int comcnspeed = CONSPEED;
|
|
int comcnmode = CONMODE;
|
|
|
|
extern struct consdev kcomcons;
|
|
static void kcomcnputc(dev_t, int);
|
|
|
|
/*
|
|
* 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();
|
|
printf("rebooting...\n");
|
|
cpu_reset();
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
/* Disable console buffering */
|
|
/* cnpollc(1);*/
|
|
|
|
/*
|
|
* 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) {
|
|
printf("The operating system has halted.\n");
|
|
printf("Please press any key to reboot.\n\n");
|
|
cngetc();
|
|
}
|
|
|
|
printf("rebooting...\n");
|
|
cpu_reset();
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
/*
|
|
* Mapping table for core kernel memory. This memory is mapped at init
|
|
* time with section mappings.
|
|
*/
|
|
struct l1_sec_map {
|
|
vaddr_t va;
|
|
vaddr_t pa;
|
|
vsize_t size;
|
|
int flags;
|
|
} l1_sec_table[] = {
|
|
{
|
|
/* Map 1MB for CSR space */
|
|
I80312_ARMCSR_VBASE,
|
|
I80312_ARMCSR_BASE,
|
|
I80312_ARMCSR_VSIZE,
|
|
0
|
|
}, {
|
|
/* Map 1MB for fast cache cleaning space */
|
|
I80312_CACHE_FLUSH_VBASE,
|
|
I80312_SA_CACHE_FLUSH_BASE,
|
|
I80312_CACHE_FLUSH_VSIZE,
|
|
1
|
|
}, {
|
|
/* Map 1MB for PCI IO space */
|
|
I80312_PCI_IO_VBASE,
|
|
I80312_PCI_IO_BASE,
|
|
I80312_PCI_IO_VSIZE,
|
|
0
|
|
}, {
|
|
/* Map 1MB for PCI IACK space */
|
|
I80312_PCI_IACK_VBASE,
|
|
I80312_PCI_IACK_SPECIAL,
|
|
I80312_PCI_IACK_VSIZE,
|
|
0
|
|
}, {
|
|
/* Map 16MB of type 1 PCI config access */
|
|
I80312_PCI_TYPE_1_CONFIG_VBASE,
|
|
I80312_PCI_TYPE_1_CONFIG,
|
|
I80312_PCI_TYPE_1_CONFIG_VSIZE,
|
|
0
|
|
}, {
|
|
/* Map 16MB of type 0 PCI config access */
|
|
I80312_PCI_TYPE_0_CONFIG_VBASE,
|
|
I80312_PCI_TYPE_0_CONFIG,
|
|
I80312_PCI_TYPE_0_CONFIG_VSIZE,
|
|
0
|
|
}, {
|
|
#if NISA > 0
|
|
/* Map 1MB of 32 bit PCI address space for ISA MEM accesses via PCI */
|
|
I80312_PCI_ISA_MEM_VBASE,
|
|
I80312_PCI_MEM_BASE,
|
|
I80312_PCI_ISA_MEM_VSIZE,
|
|
0
|
|
#endif
|
|
}, {
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
}
|
|
};
|
|
|
|
/*
|
|
* u_int initarm(struct ebsaboot *bootinfo)
|
|
*
|
|
* 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(bootinfo)
|
|
struct nwbootinfo *bootinfo;
|
|
{
|
|
int loop;
|
|
int loop1;
|
|
u_int l1pagetable;
|
|
u_int l2pagetable;
|
|
extern char page0[], page0_end[];
|
|
#if 0
|
|
extern int end[];
|
|
extern int *esym;
|
|
#endif
|
|
pv_addr_t kernel_l1pt;
|
|
pv_addr_t kernel_ptpt;
|
|
|
|
cn_tab = &kcomcons;
|
|
/*
|
|
* Heads up ... Setup the CPU / MMU / TLB functions
|
|
*/
|
|
if (set_cpufuncs())
|
|
panic("cpu not recognized!");
|
|
|
|
/* Fake bootconfig structure for the benefit of pmap.c */
|
|
/* XXX must make the memory description h/w independant */
|
|
bootconfig.dramblocks = 1;
|
|
bootconfig.dram[0].address = 0xa0000000;
|
|
bootconfig.dram[0].pages = 0x02000000 / NBPG; /* nwbootinfo.bi_nrpages */
|
|
/* - nwbootinfo.bt_memstart) / NBPG */;
|
|
|
|
/*
|
|
* Initialise the diagnostic serial console
|
|
* This allows a means of generating output during initarm().
|
|
* Once all the memory map changes are complete we can call consinit()
|
|
* and not have to worry about things moving.
|
|
*/
|
|
|
|
/* Talk to the user */
|
|
printf("\nNetBSD/netwinder booting ...\n");
|
|
|
|
/*
|
|
* Ok we have the following memory map
|
|
*
|
|
* virtual address == physical address apart from the areas:
|
|
* 0x00000000 -> 0x000fffff which is mapped to
|
|
* top 1MB of physical memory
|
|
* 0x00100000 -> 0x0fffffff which is mapped to
|
|
* physical addresses 0x00100000 -> 0x0fffffff
|
|
* 0x10000000 -> 0x1fffffff which is mapped to
|
|
* physical addresses 0x00000000 -> 0x0fffffff
|
|
* 0x20000000 -> 0xefffffff which is mapped to
|
|
* physical addresses 0x20000000 -> 0xefffffff
|
|
* 0xf0000000 -> 0xf03fffff which is mapped to
|
|
* physical addresses 0xa0000000 -> 0xa03fffff
|
|
*
|
|
* This means that the kernel is mapped suitably for continuing
|
|
* execution, all I/O is mapped 1:1 virtual to physical and
|
|
* physical memory is accessible.
|
|
*
|
|
* The initarm() has the responsibility for creating the kernel
|
|
* page tables.
|
|
* It must also set up various memory pointers that are used
|
|
* by pmap etc.
|
|
*/
|
|
|
|
/*
|
|
* Examine the boot args string for options we need to know about
|
|
* now.
|
|
*/
|
|
#if 0
|
|
process_kernel_args((char *)nwbootinfo.bt_args);
|
|
#endif
|
|
|
|
printf("initarm: Configuring system ...\n");
|
|
|
|
/*
|
|
* Set up the variables that define the availablilty of
|
|
* physical memory
|
|
*/
|
|
physical_start = 0 /*nwbootinfo.bt_memstart*/;
|
|
physical_freestart = physical_start;
|
|
physical_end = /*nwbootinfo.bt_memend*/ /*nwbootinfo.bi_nrpages * NBPG */ 64*1024*1024;
|
|
physical_freeend = physical_end;
|
|
free_pages = (physical_end - physical_start) / NBPG;
|
|
|
|
physmem = (physical_end - physical_start) / NBPG;
|
|
|
|
/* Tell the user about the memory */
|
|
printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
|
|
physical_start, physical_end - 1);
|
|
|
|
/*
|
|
* Ok the kernel occupies the bottom of physical memory.
|
|
* The first free page after the kernel can be found in
|
|
* nwbootinfo->bt_memavail
|
|
* We now need to allocate some fixed page tables to get the kernel
|
|
* going.
|
|
* We allocate one page directory and a number page tables and store
|
|
* the physical addresses in the kernel_pt_table array.
|
|
*
|
|
* Ok the next bit of physical allocation may look complex but it is
|
|
* simple really. I have done it like this so that no memory gets
|
|
* wasted during the allocation of various pages and tables that are
|
|
* all different sizes.
|
|
* The start addresses will be page aligned.
|
|
* We allocate the kernel page directory on the first free 16KB boundry
|
|
* we find.
|
|
* We allocate the kernel page tables on the first 4KB boundry we find.
|
|
* Since we allocate at least 3 L2 pagetables we know that we must
|
|
* encounter at least one 16KB aligned address.
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Allocating page tables\n");
|
|
#endif
|
|
|
|
#if 0
|
|
/* Update the address of the first free 16KB chunk of physical memory */
|
|
physical_freestart = ((uintptr_t) &end + PGOFSET) & ~PGOFSET;
|
|
#if 0
|
|
physical_freestart += (kernexec->a_syms + sizeof(int)
|
|
+ *(u_int *)((int)end + kernexec->a_syms + sizeof(int))
|
|
+ (NBPG - 1)) & ~(NBPG - 1);
|
|
#endif
|
|
#else
|
|
physical_freestart = 0x00200000; /* start at 2MB */
|
|
#endif
|
|
|
|
free_pages -= (physical_freestart - physical_start) / NBPG;
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("freestart = %#lx, free_pages = %d (%#x)\n",
|
|
physical_freestart, free_pages, free_pages);
|
|
#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;
|
|
|
|
#define alloc_pages(var, np) \
|
|
(var) = physical_freestart; \
|
|
physical_freestart += ((np) * NBPG); \
|
|
free_pages -= (np); \
|
|
memset((char *)(var), 0, ((np) * NBPG));
|
|
|
|
loop1 = 0;
|
|
kernel_l1pt.pv_pa = 0;
|
|
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
|
|
/* Are we 16KB aligned for an L1 ? */
|
|
if ((physical_freestart & (PD_SIZE - 1)) == 0
|
|
&& kernel_l1pt.pv_pa == 0) {
|
|
valloc_pages(kernel_l1pt, PD_SIZE / NBPG);
|
|
} else {
|
|
alloc_pages(kernel_pt_table[loop1], PT_SIZE / NBPG);
|
|
++loop1;
|
|
}
|
|
}
|
|
|
|
/* This should never be able to happen but better confirm that. */
|
|
if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (PD_SIZE-1)) != 0)
|
|
panic("initarm: Failed to align the kernel page directory\n");
|
|
|
|
/*
|
|
* Allocate a page for the system page mapped to V0x00000000
|
|
* This page will just contain the system vectors and can be
|
|
* shared by all processes.
|
|
*/
|
|
alloc_pages(systempage.pv_pa, 1);
|
|
|
|
/* Allocate a page for the page table to map kernel page tables*/
|
|
valloc_pages(kernel_ptpt, PT_SIZE / NBPG);
|
|
|
|
/* 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);
|
|
|
|
#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
|
|
|
|
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG);
|
|
|
|
/*
|
|
* Ok we have allocated physical pages for the primary kernel
|
|
* page tables
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Creating L1 page table at %#lx\n", kernel_l1pt.pv_pa);
|
|
#endif
|
|
|
|
/*
|
|
* Now we start consturction 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 */
|
|
map_pagetable(l1pagetable, 0x00000000,
|
|
kernel_pt_table[KERNEL_PT_SYS]);
|
|
map_pagetable(l1pagetable, KERNEL_BASE,
|
|
kernel_pt_table[KERNEL_PT_KERNEL]);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
|
map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
|
|
kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
|
map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE,
|
|
kernel_ptpt.pv_pa);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Mapping kernel\n");
|
|
#endif
|
|
|
|
/* Now we fill in the L2 pagetable for the kernel static code/data */
|
|
l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL];
|
|
|
|
#if 0
|
|
{
|
|
u_int logical;
|
|
extern int etext, end;
|
|
size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE;
|
|
size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE;
|
|
|
|
/* Round down text size and round up total size
|
|
*/
|
|
textsize = textsize & ~PGOFSET;
|
|
totalsize = (totalsize + PGOFSET) & ~PGOFSET;
|
|
logical = map_chunk(0, l2pagetable, KERNEL_BASE,
|
|
physical_start, KERNEL_TEXT_BASE - KERNEL_BASE,
|
|
AP_KRW, PT_CACHEABLE);
|
|
logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical,
|
|
physical_start + logical, textsize,
|
|
AP_KRW, PT_CACHEABLE);
|
|
logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical,
|
|
physical_start + logical, totalsize - textsize,
|
|
AP_KRW, PT_CACHEABLE);
|
|
#if 0
|
|
logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical,
|
|
physical_start + logical, kernexec->a_syms + sizeof(int)
|
|
+ *(u_int *)((int)end + kernexec->a_syms + sizeof(int)),
|
|
AP_KRW, PT_CACHEABLE);
|
|
#endif
|
|
}
|
|
#else
|
|
map_section(l1pagetable, 0xf0000000, 0x00000000, 1);
|
|
map_section(l1pagetable, 0xf0100000, 0x00100000, 1);
|
|
#endif
|
|
#if 0
|
|
/*
|
|
* PATCH PATCH ...
|
|
*
|
|
* Fixup the first word of the kernel to be the instruction
|
|
* add pc, pc, #0x41000000
|
|
*
|
|
* This traps the case where the CPU core resets due to bus contention
|
|
* on a prototype CATS system and will reboot into the firmware.
|
|
*/
|
|
*((u_int *)KERNEL_TEXT_BASE) = 0xe28ff441;
|
|
#endif
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Constructing L2 page tables\n");
|
|
#endif
|
|
|
|
/* Map the boot arguments page */
|
|
#if 0
|
|
map_entry_ro(l2pagetable, nwbootinfo.bt_vargp, nwbootinfo.bt_pargp);
|
|
#endif
|
|
|
|
/* Map the stack pages */
|
|
map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa,
|
|
IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa,
|
|
ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa,
|
|
UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa,
|
|
UPAGES * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
|
|
PD_SIZE, AP_KRW, 0);
|
|
|
|
/* Map the page table that maps the kernel pages */
|
|
map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa);
|
|
|
|
/*
|
|
* Map entries in the page table used to map PTE's
|
|
* Basically every kernel page table gets mapped here
|
|
*/
|
|
/* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */
|
|
l2pagetable = kernel_ptpt.pv_pa;
|
|
map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_KERNEL]);
|
|
map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)),
|
|
kernel_ptpt.pv_pa);
|
|
map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_SYS]);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
|
map_entry_nc(l2pagetable, ((KERNEL_VM_BASE +
|
|
(loop * 0x00400000)) >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
|
|
|
/*
|
|
* Map the system page in the kernel page table for the bottom 1Meg
|
|
* of the virtual memory map.
|
|
*/
|
|
l2pagetable = kernel_pt_table[KERNEL_PT_SYS];
|
|
map_entry(l2pagetable, 0x00000000, systempage.pv_pa);
|
|
|
|
/* Map the core memory needed before autoconfig */
|
|
loop = 0;
|
|
while (l1_sec_table[loop].size) {
|
|
vm_size_t sz;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa,
|
|
l1_sec_table[loop].pa + l1_sec_table[loop].size - 1,
|
|
l1_sec_table[loop].va);
|
|
#endif
|
|
for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_SEC_SIZE)
|
|
map_section(l1pagetable, l1_sec_table[loop].va + sz,
|
|
l1_sec_table[loop].pa + sz,
|
|
l1_sec_table[loop].flags);
|
|
++loop;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
/* Switch tables */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("freestart = %#lx, free_pages = %d (%#x)\n",
|
|
physical_freestart, free_pages, free_pages);
|
|
printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
|
|
#endif
|
|
|
|
setttb(kernel_l1pt.pv_pa);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("done!\n");
|
|
#endif
|
|
/*
|
|
* Ok the I80312 CSR registers have just moved.
|
|
* Detach the diagnostic serial port and reattach at the new address.
|
|
*/
|
|
|
|
/*
|
|
* XXX this should only be done in main() but it useful to
|
|
* have output earlier ...
|
|
*/
|
|
consinit();
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("bootstrap done.\n");
|
|
#endif
|
|
|
|
/* Right set up the vectors at the bottom of page 0 */
|
|
memcpy((char *)0x00000000, page0, page0_end - page0);
|
|
|
|
/* We have modified a text page so sync the icache */
|
|
cpu_cache_syncI();
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
printf("init subsystems: stacks ");
|
|
|
|
set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG);
|
|
set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG);
|
|
set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG);
|
|
|
|
/*
|
|
* 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 slighly better one.
|
|
*/
|
|
printf("vectors ");
|
|
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;
|
|
|
|
/* At last !
|
|
* We now have the kernel in physical memory from the bottom upwards.
|
|
* Kernel page tables are physically above this.
|
|
* The kernel is mapped to KERNEL_TEXT_BASE
|
|
* The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff
|
|
* The page tables are mapped to 0xefc00000
|
|
*/
|
|
|
|
/* Initialise the undefined instruction handlers */
|
|
printf("undefined ");
|
|
undefined_init();
|
|
|
|
/* Boot strap pmap telling it where the kernel page table is */
|
|
printf("pmap ");
|
|
pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt);
|
|
|
|
/* Setup the IRQ system */
|
|
printf("irq ");
|
|
irq_init();
|
|
printf("done.\n");
|
|
|
|
#ifdef IPKDB
|
|
/* Initialise ipkdb */
|
|
ipkdb_init();
|
|
if (boothowto & RB_KDB)
|
|
ipkdb_connect(0);
|
|
#endif
|
|
|
|
#ifdef DDB
|
|
printf("ddb: ");
|
|
db_machine_init();
|
|
#if 0
|
|
ddb_init(end[0], end + 1, esym);
|
|
#endif
|
|
|
|
if (boothowto & RB_KDB)
|
|
Debugger();
|
|
#endif
|
|
|
|
/* We return the new stack pointer address */
|
|
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
|
|
}
|
|
|
|
void
|
|
process_kernel_args(args)
|
|
char *args;
|
|
{
|
|
|
|
boothowto = 0;
|
|
|
|
/* Make a local copy of the bootargs */
|
|
strncpy(bootargs, args, MAX_BOOT_STRING);
|
|
|
|
args = bootargs;
|
|
boot_file = bootargs;
|
|
|
|
/* Skip the kernel image filename */
|
|
while (*args != ' ' && *args != 0)
|
|
++args;
|
|
|
|
if (*args != 0)
|
|
*args++ = 0;
|
|
|
|
while (*args == ' ')
|
|
++args;
|
|
|
|
boot_args = args;
|
|
|
|
printf("bootfile: %s\n", boot_file);
|
|
printf("bootargs: %s\n", boot_args);
|
|
|
|
parse_mi_bootargs(boot_args);
|
|
}
|
|
|
|
#if 0
|
|
void
|
|
arm32_cachectl(va, len, flags)
|
|
vm_offset_t va;
|
|
int len;
|
|
int flags;
|
|
{
|
|
pt_entry_t *ptep, pte;
|
|
int loop;
|
|
vm_offset_t addr;
|
|
|
|
/* printf("arm32_cachectl(%x,%x,%x)\n", va, len, flags);*/
|
|
|
|
if (flags & 1) {
|
|
addr = va;
|
|
loop = len;
|
|
while (loop > 0) {
|
|
ptep = vtopte(addr & (~PGOFSET));
|
|
pte = *ptep;
|
|
|
|
*ptep = (pte & ~(PT_C | PT_B)) | (flags & (PT_C | PT_B));
|
|
|
|
loop -= NBPG;
|
|
addr += NBPG;
|
|
}
|
|
tlb_flush();
|
|
}
|
|
|
|
cpu_cache_purgeD_rng(va, len);
|
|
}
|
|
#endif
|
|
|
|
extern struct bus_space footbridge_pci_io_bs_tag;
|
|
extern struct bus_space footbridge_pci_mem_bs_tag;
|
|
void footbridge_pci_bs_tag_init __P((void));
|
|
|
|
void
|
|
consinit(void)
|
|
{
|
|
static int consinit_called = 0;
|
|
|
|
if (consinit_called != 0)
|
|
return;
|
|
|
|
consinit_called = 1;
|
|
|
|
bust = iq80310_bs_init();
|
|
#if (NCOM > 0)
|
|
if (comcnattach(&bust, CONCOMADDR, comcnspeed,
|
|
COM_FREQ, comcnmode))
|
|
panic("can't init serial console @%x", CONCOMADDR);
|
|
#else
|
|
panic("serial console @%x not configured", CONCOMADDR);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static bus_space_handle_t kcom_base = (bus_space_handle_t) I80312_COM0_VBASE;
|
|
|
|
u_int8_t i80312_bs_r_1(void *, bus_space_handle_t, bus_size_t);
|
|
void i80312_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t);
|
|
|
|
#define KCOM_GETBYTE(r) i80312_bs_r_1(0, kcom_base, (r))
|
|
#define KCOM_PUTBYTE(r,v) i80312_bs_w_1(0, kcom_base, (r), (v))
|
|
|
|
static int
|
|
kcomcngetc(dev_t dev)
|
|
{
|
|
int stat, c;
|
|
|
|
/* block until a character becomes available */
|
|
while (!ISSET(stat = KCOM_GETBYTE(com_lsr), LSR_RXRDY))
|
|
;
|
|
|
|
c = KCOM_GETBYTE(com_data);
|
|
stat = KCOM_GETBYTE(com_iir);
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* Console kernel output character routine.
|
|
*/
|
|
static void
|
|
kcomcnputc(dev_t dev, int c)
|
|
{
|
|
int timo;
|
|
|
|
/* wait for any pending transmission to finish */
|
|
timo = 150000;
|
|
while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo)
|
|
continue;
|
|
|
|
KCOM_PUTBYTE(com_data, c);
|
|
|
|
/* wait for this transmission to complete */
|
|
timo = 1500000;
|
|
while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo)
|
|
continue;
|
|
}
|
|
|
|
static void
|
|
kcomcnpollc(dev_t dev, int on)
|
|
{
|
|
}
|
|
|
|
struct consdev kcomcons = {
|
|
NULL, NULL, kcomcngetc, kcomcnputc, kcomcnpollc, NULL,
|
|
NODEV, CN_NORMAL
|
|
};
|