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Build a minimal pagetables, with only section mappings, mapped write through,

Browse source 
to speed up the decompression.
This commit is contained in:
Olivier Houchard 2006-01-20 00:46:44 +00:00
parent c1f097baba
commit 0e187240e1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=154561
2 changed files with 55 additions and 6 deletions
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57
sys/arm/arm/elf_trampoline.c
View file

@ -30,6 +30,8 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/inflate.h>
#include <machine/elf.h>
#include <machine/pte.h>
#include <stdlib.h>
#include "opt_global.h"
@ -204,7 +206,7 @@ load_kernel(unsigned int kstart, unsigned int curaddr,unsigned int func_end,
{
Elf32_Ehdr *eh;
Elf32_Phdr phdr[512] /* XXX */, *php;
Elf32_Shdr *shdr;
Elf32_Shdr shdr[512] /* XXX */;
int i,j;
void *entry_point;
int symtabindex = -1;
@ -228,9 +230,6 @@ load_kernel(unsigned int kstart, unsigned int curaddr,unsigned int func_end,
}
/* Save the symbol tables, as there're about to be scratched. */
lastaddr = roundup(lastaddr, sizeof(long));
shdr = (Elf_Shdr *)lastaddr;
lastaddr += sizeof(*shdr) * eh->e_shnum;
memcpy(shdr, (void *)(kstart + eh->e_shoff),
sizeof(*shdr) * eh->e_shnum);
if (eh->e_shnum * eh->e_shentsize != 0 &&
@ -337,7 +336,51 @@ load_kernel(unsigned int kstart, unsigned int curaddr,unsigned int func_end,
extern char func_end[];
extern void *_end;
void __start(void)
#define PMAP_DOMAIN_KERNEL 15 /*
* Just define it instead of including the
* whole VM headers set.
*/
int __hack;
static __inline void
setup_pagetables(unsigned int pt_addr, vm_paddr_t physstart, vm_paddr_t physend)
{
unsigned int *pd = (unsigned int *)pt_addr;
vm_paddr_t addr;
int domain = (DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT;
int tmp;
bzero(pd, L1_TABLE_SIZE);
for (addr = physstart; addr < physend; addr += L1_S_SIZE)
pd[addr >> L1_S_SHIFT] = L1_TYPE_S|L1_S_C|L1_S_AP(AP_KRW)|
L1_S_DOM(PMAP_DOMAIN_KERNEL) | addr;
/* XXX: See below */
if (0xfff00000 < physstart || 0xfff00000 > physend)
pd[0xfff00000 >> L1_S_SHIFT] = L1_TYPE_S|L1_S_AP(AP_KRW)|
L1_S_DOM(PMAP_DOMAIN_KERNEL)|physstart;
__asm __volatile("mcr p15, 0, %1, c2, c0, 0\n" /* set TTB */
"mcr p15, 0, %1, c8, c7, 0\n" /* Flush TTB */
"mcr p15, 0, %2, c3, c0, 0\n" /* Set DAR */
"mrc p15, 0, %0, c1, c0, 0\n"
"orr %0, %0, #1\n" /* MMU_ENABLE */
"mcr p15, 0, %0, c1, c0, 0\n"
"mrc p15, 0, %0, c2, c0, 0\n" /* CPWAIT */
"mov r0, r0\n"
"sub pc, pc, #4\n" :
"=r" (tmp) : "r" (pd), "r" (domain));
/*
* XXX: This is the most stupid workaround I've ever wrote.
* For some reason, the KB9202 won't boot the kernel unless
* we access an address which is not in the
* 0x20000000 - 0x20ffffff range. I hope I'll understand
* what's going on later.
*/
__hack = *(volatile int *)0xfffff21c;
}
void
__start(void)
{
void *curaddr;
void *dst;
@ -348,6 +391,10 @@ void __start(void)
curaddr = (void*)((unsigned int)curaddr & 0xfff00000);
#ifdef KZIP
if (*kernel == 0x1f && kernel[1] == 0x8b) {
int pt_addr = (((int)&_end + KERNSIZE + 0x100) &
~(L1_TABLE_SIZE - 1)) + L1_TABLE_SIZE;
setup_pagetables(pt_addr, (vm_paddr_t)curaddr,
(vm_paddr_t)curaddr + 0x10000000);
/* Gzipped kernel */
dst = inflate_kernel(kernel, &_end);
kernel = (char *)&_end;

4
sys/conf/Makefile.arm
View file

@ -77,9 +77,11 @@ ${KERNEL_KO}.tramp: ${KERNEL_KO}
${OBJCOPY} ${STRIP_FLAGS} ${KERNEL_KO}.tmp
echo "#define KERNNAME \"${KERNEL_KO}.tmp.gz\"" \
>opt_kernname.h
eval $$(stat -s ${KERNEL_KO}.tmp) && \
echo "#define KERNSIZE $$st_size" >>opt_kernname.h
gzip -9 ${KERNEL_KO}.tmp
eval $$(stat -s ${KERNEL_KO}.tmp.gz) && \
echo "#define KERNSIZE $$st_size" >>opt_kernname.h
echo "#define KERNCOMPSIZE $$st_size" >>opt_kernname.h
${CC} -O2 -DKZIP -I. -c $S/kern/inflate.c -o inflate-tramp.o
${CC} -O -nostdlib -I. -Xlinker -T -Xlinker ldscript.$M.tramp \
-DKZIP $S/$M/$M/elf_trampoline.c inflate-tramp.o $S/$M/$M/inckern.S \