/* $NetBSD: iyonix_machdep.c,v 1.6 2024/02/20 23:36:02 andvar Exp $ */
/*
* Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Based on code written by Jason R. Thorpe and Steve C. Woodford for
* Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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 dependent functions for kernel setup for Iyonix.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: iyonix_machdep.c,v 1.6 2024/02/20 23:36:02 andvar Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.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 <sys/bus.h>
#include <sys/cpu.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <dev/pci/ppbreg.h>
#include <dev/ic/i8259reg.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <acorn32/include/bootconfig.h>
#include <arm/locore.h>
#include <arm/undefined.h>
#include <arm/arm32/machdep.h>
#include <arm/xscale/i80321reg.h>
#include <arm/xscale/i80321var.h>
#include <evbarm/iyonix/iyonixreg.h>
#include <evbarm/iyonix/obiovar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>
#include <dev/wscons/wsdisplay_vconsvar.h>
#include <dev/wsfont/wsfont.h>
#include "ksyms.h"
#define KERNEL_TEXT_BASE KERNEL_BASE
#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
struct vcons_screen rascons_console_screen;
struct wsscreen_descr rascons_stdscreen = {
"std",
0, 0, /* will be filled in -- XXX shouldn't, it's global */
0,
0, 0,
WSSCREEN_REVERSE
};
/*
* 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
struct bootconfig bootconfig; /* Boot config storage */
char *boot_args;
vaddr_t physical_start;
vaddr_t physical_freestart;
vaddr_t physical_freeend;
vaddr_t physical_end;
u_int free_pages;
vaddr_t pagetables_start;
/*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 minidataclean;
paddr_t msgbufphys;
#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
/* L2 table for mapping i80321 */
#define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
/* L2 tables for mapping kernel VM */
#define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 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];
char iyonix_macaddr[ETHER_ADDR_LEN];
char boot_consdev[16];
/* Prototypes */
void iyonix_pic_init(void);
void iyonix_read_machineid(void);
void consinit(void);
static void consinit_com(const char *consdev);
static void consinit_genfb(const char *consdev);
static void process_kernel_args(void);
static void parse_iyonix_bootargs(char *args);
#include "com.h"
#if NCOM > 0
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#endif
#include "genfb.h"
#if (NGENFB == 0) && (NCOM == 0)
# error "No valid console device (com or genfb)"
#elif defined(COMCONSOLE) || (NGENFB == 0)
# define DEFAULT_CONSDEV "com"
#else
# define DEFAULT_CONSDEV "genfb"
#endif
/*
* Define the default console speed for the machine.
*/
#ifndef CONSPEED
#define CONSPEED B9600
#endif /* ! CONSPEED */
#ifndef CONUNIT
#define CONUNIT 0
#endif
#ifndef CONMODE
#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | 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)
{
/*
* If we are still cold then hit the air brakes
* and crash to earth fast
*/
if (cold) {
doshutdownhooks();
pmf_system_shutdown(boothowto);
printf("The operating system has halted.\n");
printf("Please press any key to reboot.\n\n");
cngetc();
printf("rebooting...\n");
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();
pmf_system_shutdown(boothowto);
/* 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\r");
reset:
/*
* Make really really sure that all interrupts are disabled,
* and poke the Internal Bus and Peripheral Bus reset lines.
*/
(void) disable_interrupts(I32_bit|F32_bit);
*(volatile uint32_t *)(IYONIX_80321_VBASE + VERDE_ATU_BASE +
ATU_PCSR) = PCSR_RIB | PCSR_RPB;
/* ...and if that didn't work, just croak. */
printf("RESET FAILED!\n");
for (;;);
}
/* Static device mappings. */
static const struct pmap_devmap iyonix_devmap[] = {
/*
* Map the on-board devices VA == PA so that we can access them
* with the MMU on or off.
*/
{
IYONIX_OBIO_BASE,
IYONIX_OBIO_BASE,
IYONIX_OBIO_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
{
IYONIX_IOW_VBASE,
VERDE_OUT_XLATE_IO_WIN0_BASE,
VERDE_OUT_XLATE_IO_WIN_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
{
IYONIX_80321_VBASE,
VERDE_PMMR_BASE,
VERDE_PMMR_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
{
IYONIX_FLASH_BASE,
IYONIX_FLASH_BASE,
IYONIX_FLASH_SIZE,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
{
0,
0,
0,
0,
0,
}
};
/* Read out the Machine ID from the flash, and stash it away for later use. */
void
iyonix_read_machineid(void)
{
volatile uint32_t *flashbase = (uint32_t *)IYONIX_FLASH_BASE;
volatile uint16_t *flashword = (uint16_t *)IYONIX_FLASH_BASE;
union {
uint32_t w[2];
uint8_t b[8];
} machid;
/* Enter SecSi Sector Region */
flashword[0x555] = 0xAA;
flashword[0x2AA] = 0x55;
flashword[0x555] = 0x88;
machid.w[0] = flashbase[0];
machid.w[1] = flashbase[1];
iyonix_macaddr[0] = machid.b[6];
iyonix_macaddr[1] = machid.b[5];
iyonix_macaddr[2] = machid.b[4];
iyonix_macaddr[3] = machid.b[3];
iyonix_macaddr[4] = machid.b[2];
iyonix_macaddr[5] = machid.b[1];
/* Exit SecSi Sector Region */
flashword[0x555] = 0xAA;
flashword[0x2AA] = 0x55;
flashword[0x555] = 0x90;
flashword[0x555] = 0x00;
}
#define IYONIX_PIC_WRITE(a,v) (*((char *)IYONIX_OBIO_BASE + (a)) = (v))
void
iyonix_pic_init(void)
{
IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW1, ICW1_IC4|ICW1_SELECT);
IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW2, ICW2_IRL(0));
IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW3, ICW3_CASCADE(2));
IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW4, ICW4_8086);
IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_OCW1, 0x0); /* Unmask */
IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW1, ICW1_IC4|ICW1_SELECT);
IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW2, ICW2_IRL(0));
IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW3, ICW3_CASCADE(1));
IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW4, ICW4_8086);
IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_OCW1, 0x0); /* Unmask */
}
/*
* vaddr_t 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
* Initialising interrupt controllers to a sane default state
*/
vaddr_t
initarm(void *arg)
{
struct bootconfig *passed_bootconfig = arg;
extern char _end[];
int loop;
int loop1;
u_int l1pagetable;
paddr_t memstart = 0;
psize_t memsize = 0;
/* Calibrate the delay loop. */
i80321_calibrate_delay();
/* Ensure bootconfig has valid magic */
if (passed_bootconfig->magic != BOOTCONFIG_MAGIC)
printf("Bad bootconfig magic: %x\n", bootconfig.magic);
bootconfig = *passed_bootconfig;
/* Fake bootconfig structure for anything that still needs it */
/* XXX must make the memory description h/w independent */
bootconfig.dram[0].address = memstart;
bootconfig.dram[0].pages = memsize / PAGE_SIZE;
bootconfig.dramblocks = 1;
/* process arguments - can update boothowto */
process_kernel_args();
/*
* Since we map the on-board devices VA==PA, and the kernel
* is running VA==PA, it's possible for us to initialize
* the console now.
*/
consinit();
#ifdef VERBOSE_INIT_ARM
/* Talk to the user */
printf("\nNetBSD/iyonix booting ...\n");
#endif
/*
* Heads up ... Setup the CPU / MMU / TLB functions
*/
if (set_cpufuncs())
panic("cpu not recognized!");
/*
* We are currently running with the MMU enabled and the
* entire address space mapped VA==PA.
*/
/*
* Fetch the SDRAM start/size from the i80321 SDRAM configuration
* registers.
*/
i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
&memstart, &memsize);
#ifdef VERBOSE_INIT_ARM
printf("initarm: Configuring system ...\n");
#endif
/*
* Set up the variables that define the availability of
* physical memory.
*/
physical_start = memstart;
physical_end = physical_start + memsize;
physical_freestart = physical_start +
(((uintptr_t) _end - KERNEL_TEXT_BASE + PGOFSET) & ~PGOFSET);
physical_freeend = physical_end;
physmem = (physical_end - physical_start) / PAGE_SIZE;
#ifdef VERBOSE_INIT_ARM
/* Tell the user about the memory */
printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem,
physical_start, physical_end - 1);
#endif
/*
* The kernel is loaded at the base of physical memory. We allocate
* pages upwards from the top of the kernel.
*
* We need to allocate some fixed page tables to get the kernel
* going. We allocate one page directory and a number of page
* tables and store the physical addresses in the kernel_pt_table
* array.
*
* The kernel page directory must be on a 16K boundary. The page
* tables must be on 4K boundaries. What we do is allocate the
* page directory on the first 16K boundary that we encounter, and
* the page tables on 4K boundaries otherwise. Since we allocate
* at least 3 L2 page tables, we are guaranteed to encounter at
* least one 16K aligned region.
*/
#ifdef VERBOSE_INIT_ARM
printf("Allocating page tables\n");
#endif
free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
#ifdef VERBOSE_INIT_ARM
printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\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) * PAGE_SIZE); \
if (physical_freeend < physical_freestart) \
panic("initarm: out of memory"); \
free_pages -= (np); \
memset((char *)(var), 0, ((np) * PAGE_SIZE));
loop1 = 0;
kernel_l1pt.pv_pa = kernel_l1pt.pv_va = 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;
}
}
/* 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 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);
/* 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
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]);
pmap_link_l2pt(l1pagetable, IYONIX_IOPXS_VBASE,
&kernel_pt_table[KERNEL_PT_IOPXS]);
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 */
{
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 = 0; /* 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 statically mapped devices. */
pmap_devmap_bootstrap(l1pagetable, iyonix_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.
*/
/* 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);
cpu_setttb(kernel_l1pt.pv_pa, true);
cpu_tlb_flushID();
cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
iyonix_read_machineid();
/*
* Moved from cpu_startup() as data_abort_handler() references
* this during uvm init
*/
uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
#ifdef VERBOSE_INIT_ARM
printf("done!\n");
#endif
#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_md_init();
uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
atop(physical_freestart), atop(physical_freeend),
VM_FREELIST_DEFAULT);
/* Boot strap pmap telling it where managed kernel virtual memory 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
i80321_intr_init();
#ifdef VERBOSE_INIT_ARM
printf("done.\n");
#endif
#ifdef DDB
db_machine_init();
if (boothowto & RB_KDB)
Debugger();
#endif
iyonix_pic_init();
printf("args: %s\n", bootconfig.args);
printf("howto: %x\n", boothowto);
/* We return the new stack pointer address */
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
void
consinit(void)
{
static int consinit_called;
if (consinit_called != 0)
return;
consinit_called = 1;
/* We let consinit_<foo> worry about device numbers */
if (strncmp(boot_consdev, "genfb", 5) &&
strncmp(boot_consdev, "com", 3))
strcpy(boot_consdev, DEFAULT_CONSDEV);
if (!strncmp(boot_consdev, "com", 3))
consinit_com(boot_consdev);
else
consinit_genfb(boot_consdev);
}
static void
consinit_com(const char *consdev)
{
static const bus_addr_t comcnaddrs[] = {
IYONIX_UART1, /* com0 */
};
/*
* Console devices are mapped VA==PA. Our devmap reflects
* this, so register it now so drivers can map the console
* device.
*/
pmap_devmap_register(iyonix_devmap);
/* When we support more than the first serial port as console,
* we should check consdev for a number.
*/
#if NCOM > 0
if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
COM_FREQ, COM_TYPE_NORMAL, comcnmode))
{
panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
}
#else
panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
#endif
#if KGDB
#if NCOM > 0
if (strcmp(kgdb_devname, "com") == 0) {
com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate,
COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode);
}
#endif /* NCOM > 0 */
#endif /* KGDB */
}
static void
consinit_genfb(const char *consdev)
{
/* NOTYET */
}
static void
process_kernel_args(void)
{
char *args;
/* Ok now we will check the arguments for interesting parameters. */
args = bootconfig.args;
#ifdef BOOTHOWTO
boothowto = BOOTHOWTO;
#else
boothowto = 0;
#endif
/* Only arguments itself are passed from the bootloader */
while (*args == ' ')
++args;
boot_args = args;
parse_mi_bootargs(boot_args);
parse_iyonix_bootargs(boot_args);
}
static void
parse_iyonix_bootargs(char *args)
{
char *ptr;
if (get_bootconf_option(args, "consdev", BOOTOPT_TYPE_STRING, &ptr))
{
/* ptr may have trailing clutter */
strlcpy(boot_consdev, ptr, sizeof(boot_consdev));
if ( (ptr = strchr(boot_consdev, ' ')) )
*ptr = 0;
}
}
