uintptr_t
powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp)
{
struct pcpu *pc;
vm_offset_t startkernel, endkernel;
void *kmdp;
char *env;
bool ofw_bootargs = false;
#ifdef DDB
vm_offset_t ksym_start;
vm_offset_t ksym_end;
#endif
kmdp = NULL;
/* First guess at start/end kernel positions */
startkernel = __startkernel;
endkernel = __endkernel;
/* Check for ePAPR loader, which puts a magic value into r6 */
if (mdp == (void *)0x65504150)
mdp = NULL;
#ifdef AIM
/*
* If running from an FDT, make sure we are in real mode to avoid
* tromping on firmware page tables. Everything in the kernel assumes
* 1:1 mappings out of firmware, so this won't break anything not
* already broken. This doesn't work if there is live OF, since OF
* may internally use non-1:1 mappings.
*/
if (ofentry == 0)
mtmsr(mfmsr() & ~(PSL_IR | PSL_DR));
#endif
/*
* Parse metadata if present and fetch parameters. Must be done
* before console is inited so cninit gets the right value of
* boothowto.
*/
if (mdp != NULL) {
preload_metadata = mdp;
kmdp = preload_search_by_type("elf kernel");
if (kmdp != NULL) {
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *),
0);
endkernel = ulmax(endkernel, MD_FETCH(kmdp,
MODINFOMD_KERNEND, vm_offset_t));
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
db_fetch_ksymtab(ksym_start, ksym_end);
#endif
}
uintptr_t
powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp)
{
struct pcpu *pc;
vm_offset_t startkernel, endkernel;
void *kmdp;
char *env;
#ifdef DDB
vm_offset_t ksym_start;
vm_offset_t ksym_end;
#endif
kmdp = NULL;
/* First guess at start/end kernel positions */
startkernel = __startkernel;
endkernel = __endkernel;
/* Check for ePAPR loader, which puts a magic value into r6 */
if (mdp == (void *)0x65504150)
mdp = NULL;
/*
* Parse metadata if present and fetch parameters. Must be done
* before console is inited so cninit gets the right value of
* boothowto.
*/
if (mdp != NULL) {
preload_metadata = mdp;
kmdp = preload_search_by_type("elf kernel");
if (kmdp != NULL) {
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *),
0);
endkernel = ulmax(endkernel, MD_FETCH(kmdp,
MODINFOMD_KERNEND, vm_offset_t));
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
db_fetch_ksymtab(ksym_start, ksym_end);
#endif
}
static vm_offset_t
freebsd_parse_boot_param(struct arm_boot_params *abp)
{
vm_offset_t lastaddr = 0;
void *mdp;
void *kmdp;
#ifdef DDB
vm_offset_t ksym_start;
vm_offset_t ksym_end;
#endif
/*
* Mask metadata pointer: it is supposed to be on page boundary. If
* the first argument (mdp) doesn't point to a valid address the
* bootloader must have passed us something else than the metadata
* ptr, so we give up. Also give up if we cannot find metadta section
* the loader creates that we get all this data out of.
*/
if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL)
return 0;
preload_metadata = mdp;
kmdp = preload_search_by_type("elf kernel");
if (kmdp == NULL)
return 0;
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
loader_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
init_static_kenv(loader_envp, 0);
lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
db_fetch_ksymtab(ksym_start, ksym_end);
#endif
return lastaddr;
}
/*
* Fix kernel_kseg0_end address in case trampoline placed debug sympols
* data there
*/
void
mips_postboot_fixup(void)
{
static char fake_preload[256];
caddr_t preload_ptr = (caddr_t)&fake_preload[0];
size_t size = 0;
#define PRELOAD_PUSH_VALUE(type, value) do { \
*(type *)(preload_ptr + size) = (value); \
size += sizeof(type); \
} while (0);
/*
* Provide kernel module file information
*/
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_NAME);
PRELOAD_PUSH_VALUE(uint32_t, strlen("kernel") + 1);
strcpy((char*)(preload_ptr + size), "kernel");
size += strlen("kernel") + 1;
size = roundup(size, sizeof(u_long));
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_TYPE);
PRELOAD_PUSH_VALUE(uint32_t, strlen("elf kernel") + 1);
strcpy((char*)(preload_ptr + size), "elf kernel");
size += strlen("elf kernel") + 1;
size = roundup(size, sizeof(u_long));
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_ADDR);
PRELOAD_PUSH_VALUE(uint32_t, sizeof(vm_offset_t));
PRELOAD_PUSH_VALUE(vm_offset_t, KERNLOADADDR);
size = roundup(size, sizeof(u_long));
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_SIZE);
PRELOAD_PUSH_VALUE(uint32_t, sizeof(size_t));
PRELOAD_PUSH_VALUE(size_t, (size_t)&end - KERNLOADADDR);
size = roundup(size, sizeof(u_long));
/* End marker */
PRELOAD_PUSH_VALUE(uint32_t, 0);
PRELOAD_PUSH_VALUE(uint32_t, 0);
#undef PRELOAD_PUSH_VALUE
KASSERT((size < sizeof(fake_preload)),
("fake preload size is more thenallocated"));
preload_metadata = (void *)fake_preload;
#ifdef DDB
Elf_Size *trampoline_data = (Elf_Size*)kernel_kseg0_end;
Elf_Size symtabsize = 0;
vm_offset_t ksym_start;
vm_offset_t ksym_end;
if (trampoline_data[0] == SYMTAB_MAGIC) {
symtabsize = trampoline_data[1];
kernel_kseg0_end += 2 * sizeof(Elf_Size);
/* start of .symtab */
ksym_start = kernel_kseg0_end;
kernel_kseg0_end += symtabsize;
/* end of .strtab */
ksym_end = kernel_kseg0_end;
db_fetch_ksymtab(ksym_start, ksym_end);
}
#endif
}
u_int
booke_init(uint32_t arg1, uint32_t arg2)
{
struct pcpu *pc;
void *kmdp, *mdp;
vm_offset_t dtbp, end;
#ifdef DDB
vm_offset_t ksym_start;
vm_offset_t ksym_end;
#endif
kmdp = NULL;
end = (uintptr_t)_end;
dtbp = (vm_offset_t)NULL;
/* Set up TLB initially */
bootinfo = NULL;
tlb1_init();
/*
* Handle the various ways we can get loaded and started:
* - FreeBSD's loader passes the pointer to the metadata
* in arg1, with arg2 undefined. arg1 has a value that's
* relative to the kernel's link address (i.e. larger
* than 0xc0000000).
* - Juniper's loader passes the metadata pointer in arg2
* and sets arg1 to zero. This is to signal that the
* loader maps the kernel and starts it at its link
* address (unlike the FreeBSD loader).
* - U-Boot passes the standard argc and argv parameters
* in arg1 and arg2 (resp). arg1 is between 1 and some
* relatively small number, such as 64K. arg2 is the
* physical address of the argv vector.
* - ePAPR loaders pass an FDT blob in r3 (arg1) and the magic hex
* string 0x45504150 ('ePAP') in r6 (which has been lost by now).
* r4 (arg2) is supposed to be set to zero, but is not always.
*/
if (arg1 == 0) /* Juniper loader */
mdp = (void *)arg2;
else if (booke_check_for_fdt(arg1, &dtbp) == 0) { /* ePAPR */
end = roundup(end, 8);
memmove((void *)end, (void *)dtbp, fdt_totalsize((void *)dtbp));
dtbp = end;
end += fdt_totalsize((void *)dtbp);
mdp = NULL;
} else if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */
mdp = (void *)arg1;
else /* U-Boot */
mdp = NULL;
/*
* Parse metadata and fetch parameters.
*/
if (mdp != NULL) {
preload_metadata = mdp;
kmdp = preload_search_by_type("elf kernel");
if (kmdp != NULL) {
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
bootinfo = (uint32_t *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_BOOTINFO);
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
db_fetch_ksymtab(ksym_start, ksym_end);
#endif
}
uintptr_t
powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp,
uint32_t mdp_cookie)
{
struct pcpu *pc;
struct cpuref bsp;
vm_offset_t startkernel, endkernel;
char *env;
bool ofw_bootargs = false;
#ifdef DDB
vm_offset_t ksym_start;
vm_offset_t ksym_end;
#endif
/* First guess at start/end kernel positions */
startkernel = __startkernel;
endkernel = __endkernel;
/*
* If the metadata pointer cookie is not set to the magic value,
* the number in mdp should be treated as nonsense.
*/
if (mdp_cookie != 0xfb5d104d)
mdp = NULL;
#if !defined(BOOKE)
/*
* On BOOKE the BSS is already cleared and some variables
* initialized. Do not wipe them out.
*/
bzero(__sbss_start, __sbss_end - __sbss_start);
bzero(__bss_start, _end - __bss_start);
#endif
cpu_feature_setup();
#ifdef AIM
aim_early_init(fdt, toc, ofentry, mdp, mdp_cookie);
#endif
/*
* Parse metadata if present and fetch parameters. Must be done
* before console is inited so cninit gets the right value of
* boothowto.
*/
if (mdp != NULL) {
void *kmdp = NULL;
char *envp = NULL;
uintptr_t md_offset = 0;
vm_paddr_t kernelendphys;
#ifdef AIM
if ((uintptr_t)&powerpc_init > DMAP_BASE_ADDRESS)
md_offset = DMAP_BASE_ADDRESS;
#else /* BOOKE */
md_offset = VM_MIN_KERNEL_ADDRESS - kernload;
#endif
preload_metadata = mdp;
if (md_offset > 0) {
preload_metadata += md_offset;
preload_bootstrap_relocate(md_offset);
}
kmdp = preload_search_by_type("elf kernel");
if (kmdp != NULL) {
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
if (envp != NULL)
envp += md_offset;
init_static_kenv(envp, 0);
if (fdt == 0) {
fdt = MD_FETCH(kmdp, MODINFOMD_DTBP, uintptr_t);
if (fdt != 0)
fdt += md_offset;
}
kernelendphys = MD_FETCH(kmdp, MODINFOMD_KERNEND,
vm_offset_t);
if (kernelendphys != 0)
kernelendphys += md_offset;
endkernel = ulmax(endkernel, kernelendphys);
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
db_fetch_ksymtab(ksym_start, ksym_end);
#endif
}
