NetBSD-5.0.2/sys/arch/cats/cats/cats_machdep.c
/* $NetBSD: cats_machdep.c,v 1.60 2008/04/27 18:58:45 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 cyclone firmware
*
* Created : 24/11/97
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cats_machdep.c,v 1.60 2008/04/27 18:58:45 matt Exp $");
#include "opt_ddb.h"
#include "opt_pmap_debug.h"
#include "isadma.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 <dev/cons.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <machine/bootconfig.h>
#define _ARM32_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/frame.h>
#include <machine/intr.h>
#include <arm/undefined.h>
#include <arm/arm32/machdep.h>
#include <machine/cyclone_boot.h>
#include <arm/footbridge/dc21285mem.h>
#include <arm/footbridge/dc21285reg.h>
#include "ksyms.h"
#include "opt_ableelf.h"
#include "isa.h"
#if NISA > 0
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#endif
/* Kernel text starts at the base of the kernel address space. */
#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000)
#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
/*
* The range 0xf1000000 - 0xfcffffff is available for kernel VM space
* Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff
*/
/*
* Size of available KVM space, note that growkernel will grow into this.
*/
#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 = DC21285_ROM_BASE;
u_int dc21285_fclk = FCLK;
/* Define various stack sizes in pages */
#define IRQ_STACK_SIZE 1
#define ABT_STACK_SIZE 1
#define UND_STACK_SIZE 1
struct ebsaboot ebsabootinfo;
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;
/* 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 /* L2 table for mapping zero page */
#define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
#define KERNEL_PT_KERNEL_NUM 2
/* now this could move into something more generic */
/* L2 tables for mapping kernel VM */
#define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
#define KERNEL_PT_VMDATA_NUM 4 /* 16MB kernel VM !*/
#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);
int fcomcnattach(u_int iobase, int rate, tcflag_t cflag);
int fcomcndetach(void);
static void process_kernel_args(const char *);
extern void configure(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 0x3f8
#endif
#endif
#ifndef CONSDEVNAME
#define CONSDEVNAME "vga"
#endif
#define CONSPEED B38400
#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;
/*
* 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 curlwp=%p\n", howto, curlwp);
#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 {
vm_offset_t va;
vm_offset_t pa;
vm_size_t size;
vm_prot_t prot;
int cache;
} l1_sec_table[] = {
/* Map 1MB for CSR space */
{ DC21285_ARMCSR_VBASE, DC21285_ARMCSR_BASE,
DC21285_ARMCSR_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE },
/* Map 1MB for fast cache cleaning space */
{ DC21285_CACHE_FLUSH_VBASE, DC21285_SA_CACHE_FLUSH_BASE,
DC21285_CACHE_FLUSH_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_CACHE },
/* Map 1MB for PCI IO space */
{ DC21285_PCI_IO_VBASE, DC21285_PCI_IO_BASE,
DC21285_PCI_IO_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE },
/* Map 1MB for PCI IACK space */
{ DC21285_PCI_IACK_VBASE, DC21285_PCI_IACK_SPECIAL,
DC21285_PCI_IACK_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE },
/* Map 16MB of type 1 PCI config access */
{ DC21285_PCI_TYPE_1_CONFIG_VBASE, DC21285_PCI_TYPE_1_CONFIG,
DC21285_PCI_TYPE_1_CONFIG_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE },
/* Map 16MB of type 0 PCI config access */
{ DC21285_PCI_TYPE_0_CONFIG_VBASE, DC21285_PCI_TYPE_0_CONFIG,
DC21285_PCI_TYPE_0_CONFIG_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE },
/* Map 1MB of 32 bit PCI address space for ISA MEM accesses via PCI */
{ DC21285_PCI_ISA_MEM_VBASE, DC21285_PCI_MEM_BASE,
DC21285_PCI_ISA_MEM_VSIZE, VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE },
{ 0, 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(void *arm_bootargs)
{
struct ebsaboot *bootinfo = arm_bootargs;
int loop;
int loop1;
u_int l1pagetable;
extern u_int cpu_get_control(void);
/*
* Heads up ... Setup the CPU / MMU / TLB functions
*/
set_cpufuncs();
/* Copy the boot configuration structure */
ebsabootinfo = *bootinfo;
if (ebsabootinfo.bt_fclk >= 50000000
&& ebsabootinfo.bt_fclk <= 66000000)
dc21285_fclk = ebsabootinfo.bt_fclk;
/* Fake bootconfig structure for the benefit of pmap.c */
/* XXX must make the memory description h/w independent */
bootconfig.dramblocks = 1;
bootconfig.dram[0].address = ebsabootinfo.bt_memstart;
bootconfig.dram[0].pages = (ebsabootinfo.bt_memend
- ebsabootinfo.bt_memstart) / PAGE_SIZE;
/*
* 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.
*/
#ifdef FCOM_INIT_ARM
fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode);
#endif
/* Talk to the user */
printf("NetBSD/cats booting ...\n");
if (ebsabootinfo.bt_magic != BT_MAGIC_NUMBER_EBSA
&& ebsabootinfo.bt_magic != BT_MAGIC_NUMBER_CATS)
panic("Incompatible magic number passed in boot args");
#ifdef VERBOSE_INIT_ARM
/* output the incoming bootinfo */
printf("bootinfo @ %p\n", arm_bootargs);
printf("bt_magic = 0x%08x\n", ebsabootinfo.bt_magic);
printf("bt_vargp = 0x%08x\n", ebsabootinfo.bt_vargp);
printf("bt_pargp = 0x%08x\n", ebsabootinfo.bt_pargp);
printf("bt_args @ %p, contents = \"%s\"\n", ebsabootinfo.bt_args, ebsabootinfo.bt_args);
printf("bt_l1 = %p\n", ebsabootinfo.bt_l1);
printf("bt_memstart = 0x%08x\n", ebsabootinfo.bt_memstart);
printf("bt_memend = 0x%08x\n", ebsabootinfo.bt_memend);
printf("bt_memavail = 0x%08x\n", ebsabootinfo.bt_memavail);
printf("bt_fclk = 0x%08x\n", ebsabootinfo.bt_fclk);
printf("bt_pciclk = 0x%08x\n", ebsabootinfo.bt_pciclk);
printf("bt_vers = 0x%08x\n", ebsabootinfo.bt_vers);
printf("bt_features = 0x%08x\n", ebsabootinfo.bt_features);
#endif
/* {
int loop;
for (loop = 0; loop < 8; ++loop) {
printf("%08x\n", *(((int *)bootinfo)+loop));
}
}*/
/*
* 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 0x00000000 -> 0x003fffff
*
* 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.
*/
process_kernel_args(ebsabootinfo.bt_args);
printf("initarm: Configuring system ...\n");
/*
* Set up the variables that define the availablilty of
* physical memory
*/
physical_start = ebsabootinfo.bt_memstart;
physical_freestart = physical_start;
physical_end = ebsabootinfo.bt_memend;
physical_freeend = physical_end;
free_pages = (physical_end - physical_start) / PAGE_SIZE;
physmem = (physical_end - physical_start) / PAGE_SIZE;
/* 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
* ebsabootinfo->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");
#endif
/* Update the address of the first free page of physical memory */
physical_freestart = ebsabootinfo.bt_memavail;
free_pages -= (physical_freestart - physical_start) / PAGE_SIZE;
#ifdef VERBOSE_INIT_ARM
printf(" above %p\n", (void *)physical_freestart);
#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) * PAGE_SIZE);\
free_pages -= (np); \
memset((char *)(var), 0, ((np) * PAGE_SIZE));
loop1 = 0;
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
/* Are we 16KB aligned for an L1 ? */
if ((physical_freestart & (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;
}
}
#ifdef DIAGNOSTIC
/* 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");
#endif
/*
* 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 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) / PAGE_SIZE);
/*
* Ok we have allocated physical pages for the primary kernel
* page tables
*/
#ifdef VERBOSE_INIT_ARM
printf("Creating L1 page table\n");
#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 */
pmap_link_l2pt(l1pagetable, 0x00000000,
&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);
#ifdef VERBOSE_INIT_ARM
printf("Mapping kernel\n");
#endif
/* Now we fill in the L2 pagetable for the kernel static code/data */
#ifdef ABLEELF
{
extern char etext[], _end[];
size_t textsize = (uintptr_t) etext - KERNEL_BASE;
size_t totalsize = (uintptr_t) _end - KERNEL_BASE;
u_int logical;
textsize = round_page(textsize);
totalsize = round_page(totalsize);
logical = pmap_map_chunk(l1pagetable, KERNEL_BASE,
physical_start, textsize,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
(void) pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
physical_start + logical, totalsize - textsize,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
}
#else
{
struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE;
if (N_GETMAGIC(kernexec[0]) != ZMAGIC)
panic("Illegal kernel format");
else {
extern int end;
u_int logical;
logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
physical_start, kernexec->a_text,
VM_PROT_READ, PTE_CACHE);
logical += pmap_map_chunk(l1pagetable,
KERNEL_TEXT_BASE + logical,
physical_start + logical, kernexec->a_data,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
logical += pmap_map_chunk(l1pagetable,
KERNEL_TEXT_BASE + logical,
physical_start + logical, kernexec->a_bss,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
logical += pmap_map_chunk(l1pagetable,
KERNEL_TEXT_BASE + logical,
physical_start + logical, kernexec->a_syms + sizeof(int)
+ *(u_int *)((int)&end + kernexec->a_syms + sizeof(int)),
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
}
}
#endif
/*
* 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;
#ifdef VERBOSE_INIT_ARM
printf("Constructing L2 page tables\n");
#endif
/* Map the boot arguments page */
pmap_map_entry(l1pagetable, ebsabootinfo.bt_vargp,
ebsabootinfo.bt_pargp, VM_PROT_READ, PTE_CACHE);
/* 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 vector page. */
pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
/* 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_S_SIZE)
pmap_map_section(l1pagetable,
l1_sec_table[loop].va + sz,
l1_sec_table[loop].pa + sz,
l1_sec_table[loop].prot,
l1_sec_table[loop].cache);
++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.
*/
#ifdef VERBOSE_INIT_ARM
/* checking sttb address */
printf("setttb address = %p\n", cpufuncs.cf_setttb);
printf("kernel_l1pt=0x%08x old = 0x%08x, phys = 0x%08x\n",
((uint*)kernel_l1pt.pv_va)[0xf00],
((uint*)ebsabootinfo.bt_l1)[0xf00],
((uint*)kernel_l1pt.pv_pa)[0xf00]);
printf("old pt @ %p, new pt @ %p\n", (uint*)kernel_l1pt.pv_pa, (uint*)ebsabootinfo.bt_l1);
printf("Enabling System access\n");
#endif
/*
* enable the system bit in the control register, otherwise we can't
* access the kernel after the switch to the new L1 table
* I suspect cyclone hid this problem, by enabling the ROM bit
* Note can not have both SYST and ROM enabled together, the results
* are "undefined"
*/
cpu_control(CPU_CONTROL_SYST_ENABLE | CPU_CONTROL_ROM_ENABLE, CPU_CONTROL_SYST_ENABLE);
#ifdef VERBOSE_INIT_ARM
printf("switching domains\n");
#endif
/* be a client to all domains */
cpu_domains(0x55555555);
/* Switch tables */
#ifdef VERBOSE_INIT_ARM
printf("switching to new L1 page table\n");
#endif
/*
* Ok the DC21285 CSR registers are about to be moved.
* Detach the diagnostic serial port.
*/
#ifdef FCOM_INIT_ARM
fcomcndetach();
#endif
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;
/*
* 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
arm32_vector_init(ARM_VECTORS_LOW, 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.
*/
printf("init subsystems: stacks ");
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.
*/
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();
/* Load memory into UVM. */
printf("page ");
uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
/* XXX Always one RAM block -- nuke the loop. */
for (loop = 0; loop < bootconfig.dramblocks; loop++) {
paddr_t start = (paddr_t)bootconfig.dram[loop].address;
paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE);
#if NISADMA > 0
paddr_t istart, isize;
extern struct arm32_dma_range *footbridge_isa_dma_ranges;
extern int footbridge_isa_dma_nranges;
#endif
if (start < physical_freestart)
start = physical_freestart;
if (end > physical_freeend)
end = physical_freeend;
#if 0
printf("%d: %lx -> %lx\n", loop, start, end - 1);
#endif
#if NISADMA > 0
if (arm32_dma_range_intersect(footbridge_isa_dma_ranges,
footbridge_isa_dma_nranges,
start, end - start,
&istart, &isize)) {
/*
* Place the pages that intersect with the
* ISA DMA range onto the ISA DMA free list.
*/
#if 0
printf(" ISADMA 0x%lx -> 0x%lx\n", istart,
istart + isize - 1);
#endif
uvm_page_physload(atop(istart),
atop(istart + isize), atop(istart),
atop(istart + isize), VM_FREELIST_ISADMA);
/*
* Load the pieces that come before the
* intersection onto the default free list.
*/
if (start < istart) {
#if 0
printf(" BEFORE 0x%lx -> 0x%lx\n",
start, istart - 1);
#endif
uvm_page_physload(atop(start),
atop(istart), atop(start),
atop(istart), VM_FREELIST_DEFAULT);
}
/*
* Load the pieces that come after the
* intersection onto the default free list.
*/
if ((istart + isize) < end) {
#if 0
printf(" AFTER 0x%lx -> 0x%lx\n",
(istart + isize), end - 1);
#endif
uvm_page_physload(atop(istart + isize),
atop(end), atop(istart + isize),
atop(end), VM_FREELIST_DEFAULT);
}
} else {
uvm_page_physload(atop(start), atop(end),
atop(start), atop(end), VM_FREELIST_DEFAULT);
}
#else /* NISADMA > 0 */
uvm_page_physload(atop(start), atop(end),
atop(start), atop(end), VM_FREELIST_DEFAULT);
#endif /* NISADMA > 0 */
}
/* Boot strap pmap telling it where the kernel page table is */
printf("pmap ");
pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
/* Setup the IRQ system */
printf("irq ");
footbridge_intr_init();
printf("done.\n");
#if NKSYMS || defined(DDB) || defined(LKM)
#ifdef __ELF__
/* ok this is really rather sick, in ELF what happens is that the
* ELF symbol table is added after the text section.
*/
ksyms_init(0, NULL, NULL); /* XXX */
#else
{
extern int end;
extern int *esym;
ksyms_init(*(int *)&end, ((int *)&end) + 1, esym);
}
#endif /* __ELF__ */
#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);
}
static void
process_kernel_args(const char *loader_args)
{
char *args;
boothowto = 0;
/* Make a local copy of the bootargs */
strncpy(bootargs, loader_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);
}
extern struct bus_space footbridge_pci_io_bs_tag;
extern struct bus_space footbridge_pci_mem_bs_tag;
void footbridge_pci_bs_tag_init(void);
void
consinit(void)
{
static int consinit_called = 0;
const char *console = CONSDEVNAME;
if (consinit_called != 0)
return;
consinit_called = 1;
#if NISA > 0
/* Initialise the ISA subsystem early ... */
isa_footbridge_init(DC21285_PCI_IO_VBASE, DC21285_PCI_ISA_MEM_VBASE);
#endif
footbridge_pci_bs_tag_init();
get_bootconf_option(boot_args, "console", BOOTOPT_TYPE_STRING,
&console);
if (strncmp(console, "fcom", 4) == 0
|| strncmp(console, "diag", 4) == 0)
fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode);
#if (NVGA > 0)
else if (strncmp(console, "vga", 3) == 0) {
vga_cnattach(&footbridge_pci_io_bs_tag,
&footbridge_pci_mem_bs_tag, - 1, 0);
#if (NPCKBC > 0)
pckbc_cnattach(&isa_io_bs_tag, IO_KBD, KBCMDP, PCKBC_KBD_SLOT);
#endif /* NPCKBC */
}
#endif /* NVGA */
#if (NCOM > 0)
else if (strncmp(console, "com", 3) == 0) {
if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed,
COM_FREQ, COM_TYPE_NORMAL, comcnmode))
panic("can't init serial console @%x", CONCOMADDR);
}
#endif
/* Don't know what console was requested so use the fall back. */
else
fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode);
}
/* End of cats_machdep.c */