static int
register_info(char *page)
{
char *p = page;
u64 reg_info[2];
u64 info;
unsigned long phys_stacked;
pal_hints_u_t hints;
unsigned long iregs, dregs;
char *info_type[]={
"Implemented AR(s)",
"AR(s) with read side-effects",
"Implemented CR(s)",
"CR(s) with read side-effects",
};
for(info=0; info < 4; info++) {
if (ia64_pal_register_info(info, ®_info[0], ®_info[1]) != 0) return 0;
p += sprintf(p, "%-32s : ", info_type[info]);
p = bitregister_process(p, reg_info, 128);
p += sprintf(p, "\n");
}
if (ia64_pal_rse_info(&phys_stacked, &hints) == 0) {
p += sprintf(p,
"RSE stacked physical registers : %ld\n"
"RSE load/store hints : %ld (%s)\n",
phys_stacked, hints.ph_data,
hints.ph_data < RSE_HINTS_COUNT ? rse_hints[hints.ph_data]: "(??)");
}
if (ia64_pal_debug_info(&iregs, &dregs))
return 0;
p += sprintf(p,
"Instruction debug register pairs : %ld\n"
"Data debug register pairs : %ld\n", iregs, dregs);
return p - page;
}
/*
* cpu_init() initializes state that is per-CPU. This function acts
* as a 'CPU state barrier', nothing should get across.
*/
void
cpu_init (void)
{
extern void __devinit ia64_mmu_init (void *);
unsigned long num_phys_stacked;
pal_vm_info_2_u_t vmi;
unsigned int max_ctx;
struct cpuinfo_ia64 *cpu_info;
void *cpu_data;
cpu_data = per_cpu_init();
get_max_cacheline_size();
/*
* We can't pass "local_cpu_data" to identify_cpu() because we haven't called
* ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
* depends on the data returned by identify_cpu(). We break the dependency by
* accessing cpu_data() through the canonical per-CPU address.
*/
cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
identify_cpu(cpu_info);
#ifdef CONFIG_MCKINLEY
{
# define FEATURE_SET 16
struct ia64_pal_retval iprv;
if (cpu_info->family == 0x1f) {
PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
(iprv.v1 | 0x80), FEATURE_SET, 0);
}
}
#endif
/* Clear the stack memory reserved for pt_regs: */
memset(ia64_task_regs(current), 0, sizeof(struct pt_regs));
ia64_set_kr(IA64_KR_FPU_OWNER, 0);
/*
* Initialize default control register to defer all speculative faults. The
* kernel MUST NOT depend on a particular setting of these bits (in other words,
* the kernel must have recovery code for all speculative accesses). Turn on
* dcr.lc as per recommendation by the architecture team. Most IA-32 apps
* shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
* be fine).
*/
ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
| IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
if (current->mm)
BUG();
ia64_mmu_init(ia64_imva(cpu_data));
#ifdef CONFIG_IA32_SUPPORT
ia32_cpu_init();
#endif
/* Clear ITC to eliminiate sched_clock() overflows in human time. */
ia64_set_itc(0);
/* disable all local interrupt sources: */
ia64_set_itv(1 << 16);
ia64_set_lrr0(1 << 16);
ia64_set_lrr1(1 << 16);
ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
/* clear TPR & XTP to enable all interrupt classes: */
ia64_setreg(_IA64_REG_CR_TPR, 0);
#ifdef CONFIG_SMP
normal_xtp();
#endif
/* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
if (ia64_pal_vm_summary(NULL, &vmi) == 0)
max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
else {
printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
max_ctx = (1U << 15) - 1; /* use architected minimum */
}
while (max_ctx < ia64_ctx.max_ctx) {
unsigned int old = ia64_ctx.max_ctx;
if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
break;
}
if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
"stacked regs\n");
num_phys_stacked = 96;
}
/* size of physical stacked register partition plus 8 bytes: */
__get_cpu_var(ia64_phys_stacked_size_p8) = num_phys_stacked*8 + 8;
platform_cpu_init();
}