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| Current File : //usr/src/sys/arm/xscale/pxa/pxa_machdep.c |
/* $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $ */
/*-
* Copyright (c) 1994-1998 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* 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 Brini.
* 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 BRINI ``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 BRINI 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.
*
* RiscBSD kernel project
*
* machdep.c
*
* Machine dependant functions for kernel setup
*
* This file needs a lot of work.
*
* Created : 17/09/94
*/
#include "opt_ddb.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/arm/xscale/pxa/pxa_machdep.c 218913 2011-02-21 13:11:05Z cognet $");
#define _ARM32_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/signalvar.h>
#include <sys/imgact.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/cons.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/buf.h>
#include <sys/exec.h>
#include <sys/kdb.h>
#include <sys/msgbuf.h>
#include <machine/reg.h>
#include <machine/cpu.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <vm/vm_map.h>
#include <vm/vnode_pager.h>
#include <machine/pmap.h>
#include <machine/vmparam.h>
#include <machine/pcb.h>
#include <machine/undefined.h>
#include <machine/machdep.h>
#include <machine/metadata.h>
#include <machine/armreg.h>
#include <machine/bus.h>
#include <sys/reboot.h>
#include <arm/xscale/pxa/pxareg.h>
#include <arm/xscale/pxa/pxavar.h>
#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
#define KERNEL_PT_IOPXS 1
#define KERNEL_PT_BEFOREKERN 2
#define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */
#define KERNEL_PT_AFKERNEL_NUM 9
/* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
#define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
/* Define various stack sizes in pages */
#define IRQ_STACK_SIZE 1
#define ABT_STACK_SIZE 1
#define UND_STACK_SIZE 1
extern u_int data_abort_handler_address;
extern u_int prefetch_abort_handler_address;
extern u_int undefined_handler_address;
struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
extern void *_end;
extern int *end;
struct pcpu __pcpu;
struct pcpu *pcpup = &__pcpu;
/* Physical and virtual addresses for some global pages */
vm_paddr_t phys_avail[PXA2X0_SDRAM_BANKS * 2 + 4];
vm_paddr_t dump_avail[PXA2X0_SDRAM_BANKS * 2 + 4];
vm_offset_t physical_pages;
struct pv_addr systempage;
struct pv_addr msgbufpv;
struct pv_addr irqstack;
struct pv_addr undstack;
struct pv_addr abtstack;
struct pv_addr kernelstack;
struct pv_addr minidataclean;
static struct trapframe proc0_tf;
static void pxa_probe_sdram(bus_space_tag_t, bus_space_handle_t,
uint32_t *, uint32_t *);
/* Static device mappings. */
static const struct pmap_devmap pxa_devmap[] = {
/*
* Map the on-board devices up into the KVA region so we don't muck
* up user-space.
*/
{
PXA2X0_PERIPH_START + PXA2X0_PERIPH_OFFSET,
PXA2X0_PERIPH_START,
PXA250_PERIPH_END - PXA2X0_PERIPH_START,
VM_PROT_READ|VM_PROT_WRITE,
PTE_NOCACHE,
},
{ 0, 0, 0, 0, 0, }
};
#define SDRAM_START 0xa0000000
extern vm_offset_t xscale_cache_clean_addr;
void *
initarm(void *arg, void *arg2)
{
struct pv_addr kernel_l1pt;
struct pv_addr dpcpu;
int loop;
u_int l1pagetable;
vm_offset_t freemempos;
vm_offset_t freemem_pt;
vm_offset_t afterkern;
vm_offset_t freemem_after;
vm_offset_t lastaddr;
int i, j;
uint32_t memsize[PXA2X0_SDRAM_BANKS], memstart[PXA2X0_SDRAM_BANKS];
set_cpufuncs();
lastaddr = fake_preload_metadata();
pcpu_init(pcpup, 0, sizeof(struct pcpu));
PCPU_SET(curthread, &thread0);
/* Do basic tuning, hz etc */
init_param1();
freemempos = 0xa0200000;
/* Define a macro to simplify memory allocation */
#define valloc_pages(var, np) \
alloc_pages((var).pv_pa, (np)); \
(var).pv_va = (var).pv_pa + 0x20000000;
#define alloc_pages(var, np) \
freemempos -= (np * PAGE_SIZE); \
(var) = freemempos; \
memset((char *)(var), 0, ((np) * PAGE_SIZE));
while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
freemempos -= PAGE_SIZE;
valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
valloc_pages(kernel_pt_table[loop],
L2_TABLE_SIZE / PAGE_SIZE);
} else {
kernel_pt_table[loop].pv_pa = freemempos +
(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
L2_TABLE_SIZE_REAL;
kernel_pt_table[loop].pv_va =
kernel_pt_table[loop].pv_pa + 0x20000000;
}
i++;
}
freemem_pt = freemempos;
freemempos = 0xa0100000;
/*
* 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.
*/
valloc_pages(systempage, 1);
/* Allocate dynamic per-cpu area. */
valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
dpcpu_init((void *)dpcpu.pv_va, 0);
/* 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, KSTACK_PAGES);
alloc_pages(minidataclean.pv_pa, 1);
valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
#ifdef ARM_USE_SMALL_ALLOC
freemempos -= PAGE_SIZE;
freemem_pt = trunc_page(freemem_pt);
freemem_after = freemempos - ((freemem_pt - 0xa0100000) /
PAGE_SIZE) * sizeof(struct arm_small_page);
arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
, (void *)0xc0100000, freemem_pt - 0xa0100000, 1);
freemem_after -= ((freemem_after - 0xa0001000) / PAGE_SIZE) *
sizeof(struct arm_small_page);
arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
, (void *)0xc0001000, trunc_page(freemem_after) - 0xa0001000, 0);
freemempos = trunc_page(freemem_after);
freemempos -= PAGE_SIZE;
#endif
/*
* Allocate memory for the l1 and l2 page tables. The scheme to avoid
* wasting memory by allocating the l1pt on the first 16k memory was
* taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
* this to work (which is supposed to be the case).
*/
/*
* 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;
/* Map the L2 pages tables in the L1 page table */
pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
&kernel_pt_table[KERNEL_PT_SYS]);
#if 0 /* XXXBJR: What is this? Don't know if there's an analogue. */
pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
&kernel_pt_table[KERNEL_PT_IOPXS]);
#endif
pmap_link_l2pt(l1pagetable, KERNBASE,
&kernel_pt_table[KERNEL_PT_BEFOREKERN]);
pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
(((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) &
~(L1_S_SIZE - 1));
for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
&kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
}
pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
#ifdef ARM_USE_SMALL_ALLOC
if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
arm_add_smallalloc_pages((void *)(freemem_after),
(void*)(freemem_after + PAGE_SIZE),
afterkern - (freemem_after + PAGE_SIZE), 0);
}
#endif
/* Map the Mini-Data cache clean area. */
xscale_setup_minidata(l1pagetable, afterkern,
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);
pmap_devmap_bootstrap(l1pagetable, pxa_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;
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));
/*
* 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.
*/
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);
/*
* 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 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();
/*
* Sort out bus_space for on-board devices.
*/
pxa_obio_tag_init();
/*
* Fetch the SDRAM start/size from the PXA2X0 SDRAM configration
* registers.
*/
pxa_probe_sdram(obio_tag, PXA2X0_MEMCTL_BASE, memstart, memsize);
physmem = 0;
for (i = 0; i < PXA2X0_SDRAM_BANKS; i++) {
physmem += memsize[i] / PAGE_SIZE;
}
/* Fire up consoles. */
cninit();
/* Set stack for exception handlers */
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;
undefined_init();
proc_linkup(&proc0, &thread0);
thread0.td_kstack = kernelstack.pv_va;
thread0.td_pcb = (struct pcb *)
(thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
thread0.td_pcb->pcb_flags = 0;
thread0.td_frame = &proc0_tf;
pcpup->pc_curpcb = thread0.td_pcb;
/* Enable MMU, I-cache, D-cache, write buffer. */
arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
/*
* ARM USE_SMALL_ALLOC uses dump_avail, so it must be filled before
* calling pmap_bootstrap.
*/
i = 0;
for (j = 0; j < PXA2X0_SDRAM_BANKS; j++) {
if (memsize[j] > 0) {
dump_avail[i++] = round_page(memstart[j]);
dump_avail[i++] =
trunc_page(memstart[j] + memsize[j]);
}
}
dump_avail[i] = 0;
dump_avail[i] = 0;
pmap_bootstrap(pmap_curmaxkvaddr, 0xd0000000, &kernel_l1pt);
msgbufp = (void*)msgbufpv.pv_va;
msgbufinit(msgbufp, msgbufsize);
mutex_init();
i = 0;
#ifdef ARM_USE_SMALL_ALLOC
phys_avail[i++] = 0xa0000000;
phys_avail[i++] = 0xa0001000; /*
*XXX: Gross hack to get our
* pages in the vm_page_array
. */
#endif
for (j = 0; j < PXA2X0_SDRAM_BANKS; j++) {
if (memsize[j] > 0) {
phys_avail[i] = round_page(memstart[j]);
dump_avail[i++] = round_page(memstart[j]);
phys_avail[i] =
trunc_page(memstart[j] + memsize[j]);
dump_avail[i++] =
trunc_page(memstart[j] + memsize[j]);
}
}
dump_avail[i] = 0;
phys_avail[i++] = 0;
dump_avail[i] = 0;
phys_avail[i] = 0;
#ifdef ARM_USE_SMALL_ALLOC
phys_avail[2] = round_page(virtual_avail - KERNBASE + phys_avail[2]);
#else
phys_avail[0] = round_page(virtual_avail - KERNBASE + phys_avail[0]);
#endif
init_param2(physmem);
kdb_init();
return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
sizeof(struct pcb)));
}
static void
pxa_probe_sdram(bus_space_tag_t bst, bus_space_handle_t bsh,
uint32_t *memstart, uint32_t *memsize)
{
uint32_t mdcnfg, dwid, dcac, drac, dnb;
int i;
mdcnfg = bus_space_read_4(bst, bsh, MEMCTL_MDCNFG);
/*
* Scan all 4 SDRAM banks
*/
for (i = 0; i < PXA2X0_SDRAM_BANKS; i++) {
memstart[i] = 0;
memsize[i] = 0;
switch (i) {
case 0:
case 1:
if ((i == 0 && (mdcnfg & MDCNFG_DE0) == 0) ||
(i == 1 && (mdcnfg & MDCNFG_DE1) == 0))
continue;
dwid = mdcnfg >> MDCNFD_DWID01_SHIFT;
dcac = mdcnfg >> MDCNFD_DCAC01_SHIFT;
drac = mdcnfg >> MDCNFD_DRAC01_SHIFT;
dnb = mdcnfg >> MDCNFD_DNB01_SHIFT;
break;
case 2:
case 3:
if ((i == 2 && (mdcnfg & MDCNFG_DE2) == 0) ||
(i == 3 && (mdcnfg & MDCNFG_DE3) == 0))
continue;
dwid = mdcnfg >> MDCNFD_DWID23_SHIFT;
dcac = mdcnfg >> MDCNFD_DCAC23_SHIFT;
drac = mdcnfg >> MDCNFD_DRAC23_SHIFT;
dnb = mdcnfg >> MDCNFD_DNB23_SHIFT;
break;
default:
panic("pxa_probe_sdram: impossible");
}
dwid = 2 << (1 - (dwid & MDCNFD_DWID_MASK)); /* 16/32 width */
dcac = 1 << ((dcac & MDCNFD_DCAC_MASK) + 8); /* 8-11 columns */
drac = 1 << ((drac & MDCNFD_DRAC_MASK) + 11); /* 11-13 rows */
dnb = 2 << (dnb & MDCNFD_DNB_MASK); /* # of banks */
memsize[i] = dwid * dcac * drac * dnb;
memstart[i] = PXA2X0_SDRAM0_START +
(i * PXA2X0_SDRAM_BANK_SIZE);
}
}
#define TIMER_FREQUENCY 3686400
#define UNIMPLEMENTED panic("%s: unimplemented", __func__)
/* XXXBJR: Belongs with DELAY in a timer.c of some sort. */
void
cpu_startprofclock(void)
{
UNIMPLEMENTED;
}
void
cpu_stopprofclock(void)
{
UNIMPLEMENTED;
}
static struct arm32_dma_range pxa_range = {
.dr_sysbase = 0,
.dr_busbase = 0,
.dr_len = ~0u,
};
struct arm32_dma_range *
bus_dma_get_range(void)
{
return (&pxa_range);
}
int
bus_dma_get_range_nb(void)
{
return (1);
}