NetBSD-5.0.2/sys/arch/evbarm/evbarm/initarm_common.c
/* $NetBSD: initarm_common.c,v 1.6 2008/01/19 13:11:14 chris Exp $ */
/*
* Copyright 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: initarm_common.c,v 1.6 2008/01/19 13:11:14 chris Exp $");
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <uvm/uvm.h>
#include <machine/bootconfig.h>
#include <machine/cpu.h>
#include <machine/pmap.h>
#include <arm/undefined.h>
#include <arm/arm32/machdep.h>
#include <evbarm/evbarm/initarmvar.h>
/* Define various stack sizes in pages */
#define IRQ_STACK_SIZE 1
#define ABT_STACK_SIZE 1
#define UND_STACK_SIZE 1
vm_offset_t msgbufphys;
vm_offset_t physical_start;
vm_offset_t physical_end;
pv_addr_t systempage;
int physmem = 0;
struct user *proc0paddr;
extern u_int data_abort_handler_address;
extern u_int prefetch_abort_handler_address;
extern u_int undefined_handler_address;
vaddr_t
initarm_common(const struct initarm_config *ic)
{
#ifdef DIAGNOSTIC
extern vsize_t xscale_minidata_clean_size;
#endif
extern char etext[], _end[];
const BootConfig *bc;
int loop;
vaddr_t l1pagetable;
pv_addr_t kernel_l1pt;
pv_addr_t *kernel_pt_table;
pv_addr_t irqstack;
pv_addr_t undstack;
pv_addr_t abtstack;
pv_addr_t kernelstack;
pv_addr_t minidataclean;
vm_offset_t physical_freestart;
vm_offset_t physical_freeend;
vaddr_t avail;
vaddr_t pt_vstart;
paddr_t pt_pstart;
vsize_t pt_size;
u_int ptcount_total;
u_int ptcount_kernel;
u_int ptcount_fixed_io;
u_int ptcount_vmdata;
/*
* Set up the variables that define the availablilty of
* physical memory.
*/
bc = ic->ic_bootconf;
avail = round_page((vaddr_t)(uintptr_t)&_end[0]);
physical_start = bc->dram[0].address;
physical_freestart = (avail - KERNEL_BASE) + ic->ic_kernel_base_pa;
for (loop = 0; loop < bc->dramblocks; loop++) {
paddr_t blk_end;
blk_end = bc->dram[loop].address +
(bc->dram[loop].pages * PAGE_SIZE);
if (ic->ic_kernel_base_pa >= bc->dram[loop].address &&
ic->ic_kernel_base_pa < blk_end)
physical_freeend = blk_end;
physmem += bc->dram[loop].pages;
}
loop--;
physical_end = bc->dram[loop].address +
(bc->dram[loop].pages * PAGE_SIZE);
/* Tell the user about the memory */
printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
physical_start, physical_end - 1);
/*
* Okay, the kernel starts near the bottom of physical memory
* and extends to (avail - KERNEL_BASE) + ic->ic_kernel_base_pa.
* We are going to allocate our bootstrap pages upwards
* from there.
*
* 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 1K boundaries. What we do is allocate the
* page directory on the first 16K boundary that we encounter, and
* the page tables on 1K boundaries otherwise. Since we allocate
* at least 12 L2 page tables, we are guaranteed to encounter at
* least one 16K aligned region.
*/
#ifdef VERBOSE_INIT_ARM
printf("Allocating page tables\n");
#endif
#ifdef VERBOSE_INIT_ARM
printf("freestart = 0x%08lx, avail = 0x%08lx\n",
physical_freestart, avail);
#endif
/* Define a macro to simplify memory allocation */
#define valloc_l2(var, nl2) \
alloc_l2((var).pv_pa, (nl2)); \
(var).pv_va = avail; \
avail += ((nl2) * L2_TABLE_SIZE_REAL);
#define alloc_l2(var, nl2) \
if (physical_freestart >= physical_freeend) \
panic("initarm: out of memory"); \
(var) = physical_freestart; \
physical_freestart += ((nl2) * L2_TABLE_SIZE_REAL); \
memset((char *)(var), 0, ((nl2) * L2_TABLE_SIZE_REAL));
#define valloc_pages(var, np) \
valloc_l2(var, (np) * (PAGE_SIZE / L2_TABLE_SIZE_REAL))
#define alloc_pages(var, np) \
alloc_l2(var, (np) * (PAGE_SIZE / L2_TABLE_SIZE_REAL))
/*
* Burn some memory at the end of the kernel to hold ~85
* pv_addr_t structures. This is more than sufficient to
* track the page tables we'll be allocating here.
*/
kernel_pt_table = (pv_addr_t *)avail;
avail += L2_TABLE_SIZE_REAL;
physical_freestart += L2_TABLE_SIZE_REAL;
/*
* Figure out how much space to allocate for page tables
*/
#define round_sec(x) (((x) + L1_S_OFFSET) & L1_S_FRAME)
ptcount_kernel = round_sec(avail - KERNEL_BASE) / L1_S_SIZE;
ptcount_vmdata = 16; /* 16MB of KVM, initially */
ptcount_fixed_io = round_sec(ic->ic_iosize) / L1_S_SIZE;
ptcount_total =
1 + /* The System Page */
ptcount_kernel + /* text/data */
ptcount_vmdata + /* Initial kernel VM size */
ptcount_fixed_io; /* Fixed I/O mappings */
kernel_l1pt.pv_pa = 0;
pt_pstart = physical_freestart;
pt_vstart = avail;
for (loop = 0; loop < ptcount_total; ) {
/* Are we 16KB aligned for an L1 ? */
if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0
&& kernel_l1pt.pv_pa == 0) {
valloc_l2(kernel_l1pt,
L1_TABLE_SIZE / L2_TABLE_SIZE_REAL);
} else {
valloc_l2(kernel_pt_table[loop], 1);
++loop;
}
}
/* 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");
/*
* Re-align physical_freestart to a page boundary
*/
physical_freestart = round_page(physical_freestart);
avail = round_page(avail);
pt_size = physical_freestart - pt_pstart;
#ifdef VERBOSE_INIT_ARM
printf("bootstrap PTs: VA: 0x%08lx, PA: 0x%08lx, Size: 0x%08lx\n",
pt_vstart, pt_pstart, pt_size);
#endif
/* 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);
/*
* Allocate physical pages for the kernel message buffer
*/
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
/*
* Allocate a page for the system page.
* This page will just contain the system vectors and can be
* shared by all processes.
*/
alloc_pages(systempage.pv_pa, 1);
#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);
printf("System Pg: p0x%08lx v0x%08lx\n", systempage.pv_pa,
ic->ic_vecbase);
#endif
/*
* 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_va;
pmap_link_l2pt(l1pagetable, ic->ic_vecbase, kernel_pt_table++);
for (loop = 0; loop < (ptcount_kernel + ptcount_vmdata); loop++)
pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * L1_S_SIZE,
kernel_pt_table++);
for (loop = 0; loop < ptcount_fixed_io; loop++)
pmap_link_l2pt(l1pagetable, ic->ic_iobase, kernel_pt_table++);
/*
* Update the top of the kernel VM.
*
* Note that we round up 'avail' to a 1MB boundary since that's
* what pmap_growkernel() expects.
*/
avail = round_sec(avail);
pmap_curmaxkvaddr = avail + (ptcount_vmdata * L1_S_SIZE);
#ifdef VERBOSE_INIT_ARM
printf("Mapping kernel\n");
#endif
/* Now we fill in the L2 pagetable for the kernel static code/data */
{
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);
}
#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);
/* 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, ic->ic_vecbase, systempage.pv_pa,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
/* Map page tables */
pmap_map_chunk(l1pagetable, pt_vstart, pt_pstart,
pt_size, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
/*
* Map fixed I/O space
*/
for (loop = 0; loop < ic->ic_nio; loop++) {
#ifdef VERBOSE_INIT_ARM
printf("Fixed I/O: 0x%08lx -> 0x%08lx @ 0x%08lx (0x%x, %d)\n",
ic->ic_io[loop].ii_pa,
ic->ic_io[loop].ii_pa + ic->ic_io[loop].ii_size - 1,
ic->ic_io[loop].ii_kva, ic->ic_io[loop].ii_prot,
ic->ic_io[loop].ii_cache);
#endif
#ifdef DEBUG
if (ic->ic_io[loop].ii_kva < ic->ic_iobase ||
(ic->ic_io[loop].ii_kva + ic->ic_io[loop].ii_kva) >
ic->ic_iosize)
panic("initarm_common: bad fixed i/o range: %d", loop);
#endif
pmap_map_chunk(l1pagetable, ic->ic_io[loop].ii_kva,
ic->ic_io[loop].ii_pa, ic->ic_io[loop].ii_size,
ic->ic_io[loop].ii_prot, ic->ic_io[loop].ii_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);
setttb(kernel_l1pt.pv_pa);
cpu_tlb_flushID();
cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
/*
* Moved from cpu_startup() as data_abort_handler() references
* this during uvm init
*/
proc0paddr = (struct user *)kernelstack.pv_va;
lwp0.l_addr = proc0paddr;
#ifdef VERBOSE_INIT_ARM
printf("done!\n");
#endif
/*
* Fix up the vector table
*/
arm32_vector_init(ic->ic_vecbase, ARM_VEC_ALL);
/*
* Pages were allocated during the secondary bootstrap for the
* stacks for different CPU modes.
* We must now set the r13 registers in the different CPU modes to
* point to these stacks.
* Since the ARM stacks use STMFD etc. we must set r13 to the top end
* of the stack memory.
*/
#ifdef VERBOSE_INIT_ARM
printf("init subsystems: stacks ");
#endif
set_stackptr(PSR_IRQ32_MODE,
irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
set_stackptr(PSR_ABT32_MODE,
abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
set_stackptr(PSR_UND32_MODE,
undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
/*
* Well we should set a data abort handler.
* Once things get going this will change as we will need a proper
* handler.
* Until then we will use a handler that just panics but tells us
* why.
* Initialisation of the vectors will just panic on a data abort.
* This just fills in a slightly better one.
*/
#ifdef VERBOSE_INIT_ARM
printf("vectors ");
#endif
data_abort_handler_address = (u_int)data_abort_handler;
prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
undefined_handler_address = (u_int)undefinedinstruction_bounce;
/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
printf("undefined ");
#endif
undefined_init();
/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
printf("page ");
#endif
uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
atop(physical_freestart), atop(physical_freeend),
VM_FREELIST_DEFAULT);
for (loop = 1; loop < bc->dramblocks; loop++) {
paddr_t blk_start;
paddr_t blk_end;
blk_start = bc->dram[loop].address;
blk_end = blk_start + (bc->dram[loop].pages * PAGE_SIZE);
/*
* XXX: Support different free lists
*/
uvm_page_physload(atop(blk_start), atop(blk_end),
atop(blk_start), atop(blk_end),
VM_FREELIST_DEFAULT);
}
/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
printf("pmap ");
#endif
pmap_bootstrap((pd_entry_t *)l1pagetable, avail);
#ifdef VERBOSE_INIT_ARM
printf("Done.\n");
#endif
return (kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}