/*      $NetBSD: ixm1200_machdep.c,v 1.69 2025/12/22 07:45:46 skrll Exp $ */

/*
 * Copyright (c) 2002, 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.
 *
 * 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.69 2025/12/22 07:45:46 skrll Exp $");

#include "opt_arm_debug.h"
#include "opt_console.h"
#include "opt_ddb.h"
#include "opt_modular.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 "ksyms.h"

#if NKSYMS || defined(DDB) || defined(MODULAR)
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <sys/exec_elf.h>
#endif

#include <machine/bootconfig.h>
#include <arm/locore.h>
#include <arm/undefined.h>

#include <arm/arm32/machdep.h>

#include <arm/ixp12x0/ixp12x0reg.h>
#include <arm/ixp12x0/ixp12x0var.h>
#include <arm/ixp12x0/ixp12x0_comreg.h>
#include <arm/ixp12x0/ixp12x0_comvar.h>
#include <arm/ixp12x0/ixp12x0_pcireg.h>

#include <evbarm/ixm1200/ixm1200reg.h>
#include <evbarm/ixm1200/ixm1200var.h>

/* XXX for consinit related hacks */
#include <sys/conf.h>

void ixp12x0_reset(void) __attribute__((noreturn));

/* 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 dependent as it varies depending
 * on where the ROM appears when you turn the MMU off.
 */

/*
 * Define the default console speed for the board.
 */
#ifndef CONMODE
#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */
#endif
#ifndef CONSPEED
#define CONSPEED B38400
#endif
#ifndef CONADDR
#define CONADDR IXPCOM_UART_BASE
#endif

BootConfig bootconfig;          /* Boot config storage */
char *boot_args = NULL;
char *boot_file = NULL;

vaddr_t physical_start;
vaddr_t physical_freestart;
vaddr_t physical_freeend;
vaddr_t physical_end;
u_int free_pages;

/*int debug_flags;*/
#ifndef PMAP_STATIC_L1S
int max_processes = 64;                 /* Default number */
#endif  /* !PMAP_STATIC_L1S */

paddr_t msgbufphys;

extern int end;

#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_KERNEL_NUM    2
#define KERNEL_PT_IO            (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
                                        /* Page table for mapping IO */
#define KERNEL_PT_VMDATA        (KERNEL_PT_IO + 1)
                                        /* Page tables for mapping kernel VM */
#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];

#ifdef CPU_IXP12X0
#define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2)
extern unsigned int ixp12x0_cache_clean_addr;
extern unsigned int ixp12x0_cache_clean_size;
static vaddr_t ixp12x0_cc_base;
#endif  /* CPU_IXP12X0 */

/* Prototypes */

void consinit(void);
u_int cpu_get_control(void);

void ixdp_ixp12x0_cc_setup(void);

/*
 * 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("Halted while still in the ICE age.\n");
                printf("The operating system has halted.\n");
                printf("Please press any key to reboot.\n\n");
                cngetc();
                printf("rebooting...\n");
                ixp12x0_reset();
        }

        /* Disable console buffering */
        cnpollc(true);

        /*
         * 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");

        /* all interrupts are disabled */
        disable_interrupts(I32_bit);

        ixp12x0_reset();

        /* ...and if that didn't work, just croak. */
        printf("RESET FAILED!\n");
        for (;;);
}

/* Static device mappings. */
static const struct pmap_devmap ixm1200_devmap[] = {
        /* StrongARM System and Peripheral Registers */
        DEVMAP_ENTRY(
                IXP12X0_SYS_VBASE,
                IXP12X0_SYS_HWBASE,
                IXP12X0_SYS_SIZE
        ),
        /* PCI Registers Accessible Through StrongARM Core */
        DEVMAP_ENTRY(
                IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE,
                IXP12X0_PCI_SIZE
        ),
        /* PCI Registers Accessible Through I/O Cycle Access */
        DEVMAP_ENTRY(
                IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE,
                IXP12X0_PCI_IO_SIZE
        ),
        /* PCI Type0 Configuration Space */
        DEVMAP_ENTRY(
                IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE,
                IXP12X0_PCI_TYPE0_SIZE
        ),
        /* PCI Type1 Configuration Space */
        DEVMAP_ENTRY(
                IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE,
                IXP12X0_PCI_TYPE1_SIZE
        ),
        DEVMAP_ENTRY_END
};

/*
 * 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
 */
vaddr_t
initarm(void *arg)
{
        int loop;
        int loop1;
        u_int kerneldatasize, symbolsize;
        vaddr_t l1pagetable;
        vaddr_t freemempos;
#if NKSYMS || defined(DDB) || defined(MODULAR)
        Elf_Shdr *sh;
#endif

        cpu_reset_address = ixp12x0_reset;

        /*
         * Since we map v0xf0000000 == p0x90000000, it's possible for
         * us to initialize the console now.
         */
        consinit();

#ifdef VERBOSE_INIT_ARM
        /* Talk to the user */
        printf("\nNetBSD/evbarm (IXM1200) 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.dram[0].address = 0xc0000000;
        bootconfig.dram[0].pages   = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */
        bootconfig.dramblocks = 1;

        kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;

        symbolsize = 0;

#if NKSYMS || defined(DDB) || defined(MODULAR)
        if (! memcmp(&end, "\177ELF", 4)) {
/*
 * XXXGCC12.
 * This accesses beyond what "int end" technically supplies.
 */
#pragma GCC push_options
#pragma GCC diagnostic ignored "-Warray-bounds"
                sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff);
#pragma GCC pop_options
                loop = ((Elf_Ehdr *)&end)->e_shnum;
                for(; loop; loop--, sh++)
                        if (sh->sh_offset > 0 &&
                            (sh->sh_offset + sh->sh_size) > symbolsize)
                                symbolsize = sh->sh_offset + sh->sh_size;
        }
#endif
#ifdef VERBOSE_INIT_ARM
        printf("kernsize=0x%x\n", kerneldatasize);
#endif
        kerneldatasize += symbolsize;
        kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;

        /*
         * Set up the variables that define the availability of physical
         * memory
         */
        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;

        freemempos = 0xc0000000;

#ifdef VERBOSE_INIT_ARM
        printf("Allocating page tables\n");
#endif
        free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
        printf("CP15 Register1 = 0x%08x\n", cpu_get_control());
        printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
                physical_freestart, free_pages, free_pages);
        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;
#define alloc_pages(var, np)                            \
        (var) = freemempos;                             \
        memset((char *)(var), 0, ((np) * PAGE_SIZE));   \
        freemempos += (np) * PAGE_SIZE;

        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;
                }
        }

#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);

#ifdef CPU_IXP12X0
        /*
         * XXX totally stuffed hack to work round problems introduced
         * in recent versions of the pmap code. Due to the calls used there
         * we cannot allocate virtual memory during bootstrap.
         */
        for(;;) {
                alloc_pages(ixp12x0_cc_base, 1);
                if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1)))
                        break;
        }
        {
                vaddr_t dummy;
                alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1);
        }
        ixp12x0_cache_clean_addr = ixp12x0_cc_base;
        ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2;
#endif /* CPU_IXP12X0 */

#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, IXP12X0_IO_VBASE,
            &kernel_pt_table[KERNEL_PT_IO]);

#ifdef VERBOSE_INIT_ARM
        printf("Mapping kernel\n");
#endif

#if XXX
        /* Now we fill in the L2 pagetable for the kernel 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);
        }
#else
        {
                pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
                    KERNEL_TEXT_BASE, kerneldatasize,
                    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
        }
#endif

#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 vector page. */
        pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
            VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

#ifdef VERBOSE_INIT_ARM
        printf("systempage (vector page): p0x%08lx v0x%08lx\n",
               systempage.pv_pa, vector_page);
#endif

        /* Map the statically mapped devices. */
        pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap);

#ifdef VERBOSE_INIT_ARM
        printf("done.\n");
#endif

        /*
         * Map the Dcache Flush page.
         * Hw Ref Manual 3.2.4.5 Software Dcache Flush
         */
        pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000,
            CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE);

        /*
         * 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 */
        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));

        /*
         * Moved here from cpu_startup() as data_abort_handler() references
         * this during init
         */
        uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

        /*
         * We must now clean the cache again....
         * Cleaning may be done by reading new data to displace any
         * dirty data in the cache. This will have happened in cpu_setttb()
         * but since we are boot strapping the addresses used for the read
         * may have just been remapped and thus the cache could be out
         * of sync. A re-clean after the switch will cure this.
         * After booting there are no gross relocations of the kernel thus
         * this problem will not occur after initarm().
         */
        cpu_idcache_wbinv_all();

        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);
#ifdef VERBOSE_INIT_ARM
        printf("kstack V%08lx P%08lx\n", kernelstack.pv_va,
            kernelstack.pv_pa);
#endif  /* VERBOSE_INIT_ARM */

        /*
         * 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;
#ifdef VERBOSE_INIT_ARM
        printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address);
        printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address);
        printf("undefined_handler_address = %08x\n", undefined_handler_address);
#endif

        /* 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
        ixp12x0_intr_init();

#ifdef VERBOSE_INIT_ARM
        printf("done.\n");
#endif

#ifdef VERBOSE_INIT_ARM
        printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
                physical_freestart, free_pages, free_pages);
        printf("freemempos=%08lx\n", freemempos);
        printf("switching to new L1 page table  @%#lx... \n", kernel_l1pt.pv_pa);
#endif

        consinit();
#ifdef VERBOSE_INIT_ARM
        printf("consinit \n");
#endif

        ixdp_ixp12x0_cc_setup();

#ifdef VERBOSE_INIT_ARM
        printf("bootstrap done.\n");
#endif

#if NKSYMS || defined(DDB) || defined(MODULAR)
        ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize);
#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;
}

void
consinit(void)
{
        static int consinit_called = 0;

        if (consinit_called != 0)
                return;

        consinit_called = 1;

        pmap_devmap_register(ixm1200_devmap);

        if (ixpcomcnattach(&ixp12x0_bs_tag,
                           IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE,
                           CONSPEED, CONMODE))
                panic("can't init serial console @%lx", IXPCOM_UART_HWBASE);
}

/*
 * For optimal cache cleaning we need two 16K banks of
 * virtual address space that NOTHING else will access
 * and then we alternate the cache cleaning between the
 * two banks.
 * The cache cleaning code requires 2 banks aligned
 * on total size boundary so the banks can be alternated by
 * xorring the size bit (assumes the bank size is a power of 2)
 */
void
ixdp_ixp12x0_cc_setup(void)
{
        int loop;
        paddr_t kaddr;

        (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr);
        for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) {
                pt_entry_t * const ptep = vtopte(ixp12x0_cc_base + loop);
                const pt_entry_t npte = L2_S_PROTO | kaddr |
                    L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode;
                l2pte_set(ptep, npte, 0);
                PTE_SYNC(ptep);
        }
        ixp12x0_cache_clean_addr = ixp12x0_cc_base;
        ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2;
}