/**
* reserve_memory - setup reserved memory areas
*
* Setup the reserved memory areas set aside for the boot parameters,
* initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
* see include/asm-ia64/meminit.h if you need to define more.
*/
void __init
reserve_memory (void)
{
int n = 0;
/*
* none of the entries in this table overlap
*/
rsvd_region[n].start = (unsigned long) ia64_boot_param;
rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
n++;
rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
n++;
rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
rsvd_region[n].end = (rsvd_region[n].start
+ strlen(__va(ia64_boot_param->command_line)) + 1);
n++;
rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
rsvd_region[n].end = (unsigned long) ia64_imva(_end);
n++;
#ifdef CONFIG_BLK_DEV_INITRD
if (ia64_boot_param->initrd_start) {
rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
n++;
}
#endif
efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
n++;
/* end of memory marker */
rsvd_region[n].start = ~0UL;
rsvd_region[n].end = ~0UL;
n++;
num_rsvd_regions = n;
sort_regions(rsvd_region, num_rsvd_regions);
}
/*
* 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();
}
/**
* reserve_memory - setup reserved memory areas
*
* Setup the reserved memory areas set aside for the boot parameters,
* initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
* see include/asm-ia64/meminit.h if you need to define more.
*/
void __init
reserve_memory (void)
{
int n = 0;
/*
* none of the entries in this table overlap
*/
rsvd_region[n].start = (unsigned long) ia64_boot_param;
rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
n++;
rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
n++;
rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
rsvd_region[n].end = (rsvd_region[n].start
+ strlen(__va(ia64_boot_param->command_line)) + 1);
n++;
rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
rsvd_region[n].end = (unsigned long) ia64_imva(_end);
n++;
#ifdef CONFIG_BLK_DEV_INITRD
if (ia64_boot_param->initrd_start) {
rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
n++;
}
#endif
#ifdef CONFIG_PROC_VMCORE
if (reserve_elfcorehdr(&rsvd_region[n].start,
&rsvd_region[n].end) == 0)
n++;
#endif
efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
n++;
#ifdef CONFIG_KEXEC
/* crashkernel=size@offset specifies the size to reserve for a crash
* kernel. If offset is 0, then it is determined automatically.
* By reserving this memory we guarantee that linux never set's it
* up as a DMA target.Useful for holding code to do something
* appropriate after a kernel panic.
*/
{
char *from = strstr(boot_command_line, "crashkernel=");
unsigned long base, size;
if (from) {
size = memparse(from + 12, &from);
if (*from == '@')
base = memparse(from+1, &from);
else
base = 0;
if (size) {
if (!base) {
sort_regions(rsvd_region, n);
base = kdump_find_rsvd_region(size,
rsvd_region, n);
}
if (base != ~0UL) {
rsvd_region[n].start =
(unsigned long)__va(base);
rsvd_region[n].end =
(unsigned long)__va(base + size);
n++;
crashk_res.start = base;
crashk_res.end = base + size - 1;
}
}
}
efi_memmap_res.start = ia64_boot_param->efi_memmap;
efi_memmap_res.end = efi_memmap_res.start +
ia64_boot_param->efi_memmap_size;
boot_param_res.start = __pa(ia64_boot_param);
boot_param_res.end = boot_param_res.start +
sizeof(*ia64_boot_param);
}
#endif
/* end of memory marker */
rsvd_region[n].start = ~0UL;
rsvd_region[n].end = ~0UL;
n++;
num_rsvd_regions = n;
BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
sort_regions(rsvd_region, num_rsvd_regions);
}
