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
booke_init(u_long arg1, u_long arg2)
{
uintptr_t ret;
void *mdp;
vm_offset_t dtbp, end;
end = (uintptr_t)_end;
dtbp = (vm_offset_t)NULL;
/* Set up TLB initially */
bootinfo = NULL;
bzero(__sbss_start, __sbss_end - __sbss_start);
bzero(__bss_start, _end - __bss_start);
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);
__endkernel = end;
mdp = NULL;
} else if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */
mdp = (void *)arg1;
else /* U-Boot */
mdp = NULL;
/* Default to 32 byte cache line size. */
switch ((mfpvr()) >> 16) {
case FSL_E500mc:
case FSL_E5500:
case FSL_E6500:
cacheline_size = 64;
break;
}
ret = powerpc_init(dtbp, 0, 0, mdp);
/* Enable caches */
booke_enable_l1_cache();
booke_enable_l2_cache();
booke_enable_bpred();
return (ret);
}