* 2 of the License, or (at your option) any later version.
*/
+#undef DEBUG
+
#include <linux/config.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
#include <asm/mmu_context.h>
#include <asm/paca.h>
#include <asm/cputable.h>
+#include <asm/cacheflush.h>
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
-extern void slb_allocate(unsigned long ea);
+extern void slb_allocate_realmode(unsigned long ea);
+extern void slb_allocate_user(unsigned long ea);
+
+static void slb_allocate(unsigned long ea)
+{
+ /* Currently, we do real mode for all SLBs including user, but
+ * that will change if we bring back dynamic VSIDs
+ */
+ slb_allocate_realmode(ea);
+}
static inline unsigned long mk_esid_data(unsigned long ea, unsigned long slot)
{
{
/* If you change this make sure you change SLB_NUM_BOLTED
* appropriately too. */
- unsigned long ksp_flags = SLB_VSID_KERNEL;
+ unsigned long linear_llp, virtual_llp, lflags, vflags;
unsigned long ksp_esid_data;
WARN_ON(!irqs_disabled());
- if (cpu_has_feature(CPU_FTR_16M_PAGE))
- ksp_flags |= SLB_VSID_L;
+ linear_llp = mmu_psize_defs[mmu_linear_psize].sllp;
+ virtual_llp = mmu_psize_defs[mmu_virtual_psize].sllp;
+ lflags = SLB_VSID_KERNEL | linear_llp;
+ vflags = SLB_VSID_KERNEL | virtual_llp;
ksp_esid_data = mk_esid_data(get_paca()->kstack, 2);
if ((ksp_esid_data & ESID_MASK) == KERNELBASE)
/* Slot 2 - kernel stack */
"slbmte %2,%3\n"
"isync"
- :: "r"(mk_vsid_data(VMALLOCBASE, SLB_VSID_KERNEL)),
+ :: "r"(mk_vsid_data(VMALLOCBASE, vflags)),
"r"(mk_esid_data(VMALLOCBASE, 1)),
- "r"(mk_vsid_data(ksp_esid_data, ksp_flags)),
+ "r"(mk_vsid_data(ksp_esid_data, lflags)),
"r"(ksp_esid_data)
: "memory");
}
get_paca()->slb_cache_ptr = 0;
get_paca()->context = mm->context;
+#ifdef CONFIG_PPC_64K_PAGES
+ get_paca()->pgdir = mm->pgd;
+#endif /* CONFIG_PPC_64K_PAGES */
/*
* preload some userspace segments into the SLB.
slb_allocate(unmapped_base);
}
+static inline void patch_slb_encoding(unsigned int *insn_addr,
+ unsigned int immed)
+{
+ /* Assume the instruction had a "0" immediate value, just
+ * "or" in the new value
+ */
+ *insn_addr |= immed;
+ flush_icache_range((unsigned long)insn_addr, 4+
+ (unsigned long)insn_addr);
+}
+
void slb_initialize(void)
{
+ unsigned long linear_llp, virtual_llp;
+ static int slb_encoding_inited;
+ extern unsigned int *slb_miss_kernel_load_linear;
+ extern unsigned int *slb_miss_kernel_load_virtual;
+ extern unsigned int *slb_miss_user_load_normal;
+#ifdef CONFIG_HUGETLB_PAGE
+ extern unsigned int *slb_miss_user_load_huge;
+ unsigned long huge_llp;
+
+ huge_llp = mmu_psize_defs[mmu_huge_psize].sllp;
+#endif
+
+ /* Prepare our SLB miss handler based on our page size */
+ linear_llp = mmu_psize_defs[mmu_linear_psize].sllp;
+ virtual_llp = mmu_psize_defs[mmu_virtual_psize].sllp;
+ if (!slb_encoding_inited) {
+ slb_encoding_inited = 1;
+ patch_slb_encoding(slb_miss_kernel_load_linear,
+ SLB_VSID_KERNEL | linear_llp);
+ patch_slb_encoding(slb_miss_kernel_load_virtual,
+ SLB_VSID_KERNEL | virtual_llp);
+ patch_slb_encoding(slb_miss_user_load_normal,
+ SLB_VSID_USER | virtual_llp);
+
+ DBG("SLB: linear LLP = %04x\n", linear_llp);
+ DBG("SLB: virtual LLP = %04x\n", virtual_llp);
+#ifdef CONFIG_HUGETLB_PAGE
+ patch_slb_encoding(slb_miss_user_load_huge,
+ SLB_VSID_USER | huge_llp);
+ DBG("SLB: huge LLP = %04x\n", huge_llp);
+#endif
+ }
+
/* On iSeries the bolted entries have already been set up by
* the hypervisor from the lparMap data in head.S */
#ifndef CONFIG_PPC_ISERIES
- unsigned long flags = SLB_VSID_KERNEL;
+ {
+ unsigned long lflags, vflags;
- /* Invalidate the entire SLB (even slot 0) & all the ERATS */
- if (cpu_has_feature(CPU_FTR_16M_PAGE))
- flags |= SLB_VSID_L;
+ lflags = SLB_VSID_KERNEL | linear_llp;
+ vflags = SLB_VSID_KERNEL | virtual_llp;
- asm volatile("isync":::"memory");
- asm volatile("slbmte %0,%0"::"r" (0) : "memory");
+ /* Invalidate the entire SLB (even slot 0) & all the ERATS */
+ asm volatile("isync":::"memory");
+ asm volatile("slbmte %0,%0"::"r" (0) : "memory");
asm volatile("isync; slbia; isync":::"memory");
- create_slbe(KERNELBASE, flags, 0);
- create_slbe(VMALLOCBASE, SLB_VSID_KERNEL, 1);
+ create_slbe(KERNELBASE, lflags, 0);
+
+ /* VMALLOC space has 4K pages always for now */
+ create_slbe(VMALLOCBASE, vflags, 1);
+
/* We don't bolt the stack for the time being - we're in boot,
* so the stack is in the bolted segment. By the time it goes
* elsewhere, we'll call _switch() which will bolt in the new
* one. */
asm volatile("isync":::"memory");
-#endif
+ }
+#endif /* CONFIG_PPC_ISERIES */
get_paca()->stab_rr = SLB_NUM_BOLTED;
}
projects / powerpc.git / blobdiff