obj-$(CONFIG_40x) += 40x.o
obj-$(CONFIG_44x) += 44x.o
obj-$(CONFIG_PPC_8xx) += 8xx.o
-obj-$(CONFIG_PPC_FSL_BOOK3E) += fsl_booke.o
+obj-$(CONFIG_PPC_FSL_BOOK3E) += fsl_book3e.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr_booke.o
ifdef CONFIG_HUGETLB_PAGE
obj-$(CONFIG_PPC_FSL_BOOK3E) += book3e_hugetlbpage.o
# Disable kcov instrumentation on sensitive code
# This is necessary for booting with kcov enabled on book3e machines
KCOV_INSTRUMENT_tlb.o := n
-KCOV_INSTRUMENT_fsl_booke.o := n
+KCOV_INSTRUMENT_fsl_book3e.o := n
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Modifications by Kumar Gala (galak@kernel.crashing.org) to support
+ * E500 Book E processors.
+ *
+ * Copyright 2004,2010 Freescale Semiconductor, Inc.
+ *
+ * This file contains the routines for initializing the MMU
+ * on the 4xx series of chips.
+ * -- paulus
+ *
+ * Derived from arch/ppc/mm/init.c:
+ * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
+ * and Cort Dougan (PReP) (cort@cs.nmt.edu)
+ * Copyright (C) 1996 Paul Mackerras
+ *
+ * Derived from "arch/i386/mm/init.c"
+ * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
+ */
+
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/stddef.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/highmem.h>
+#include <linux/memblock.h>
+
+#include <asm/prom.h>
+#include <asm/io.h>
+#include <asm/mmu_context.h>
+#include <asm/mmu.h>
+#include <linux/uaccess.h>
+#include <asm/smp.h>
+#include <asm/machdep.h>
+#include <asm/setup.h>
+#include <asm/paca.h>
+
+#include <mm/mmu_decl.h>
+
+unsigned int tlbcam_index;
+
+#define NUM_TLBCAMS (64)
+struct tlbcam TLBCAM[NUM_TLBCAMS];
+
+struct tlbcamrange {
+ unsigned long start;
+ unsigned long limit;
+ phys_addr_t phys;
+} tlbcam_addrs[NUM_TLBCAMS];
+
+unsigned long tlbcam_sz(int idx)
+{
+ return tlbcam_addrs[idx].limit - tlbcam_addrs[idx].start + 1;
+}
+
+#ifdef CONFIG_FSL_BOOKE
+/*
+ * Return PA for this VA if it is mapped by a CAM, or 0
+ */
+phys_addr_t v_block_mapped(unsigned long va)
+{
+ int b;
+ for (b = 0; b < tlbcam_index; ++b)
+ if (va >= tlbcam_addrs[b].start && va < tlbcam_addrs[b].limit)
+ return tlbcam_addrs[b].phys + (va - tlbcam_addrs[b].start);
+ return 0;
+}
+
+/*
+ * Return VA for a given PA or 0 if not mapped
+ */
+unsigned long p_block_mapped(phys_addr_t pa)
+{
+ int b;
+ for (b = 0; b < tlbcam_index; ++b)
+ if (pa >= tlbcam_addrs[b].phys
+ && pa < (tlbcam_addrs[b].limit-tlbcam_addrs[b].start)
+ +tlbcam_addrs[b].phys)
+ return tlbcam_addrs[b].start+(pa-tlbcam_addrs[b].phys);
+ return 0;
+}
+#endif
+
+/*
+ * Set up a variable-size TLB entry (tlbcam). The parameters are not checked;
+ * in particular size must be a power of 4 between 4k and the max supported by
+ * an implementation; max may further be limited by what can be represented in
+ * an unsigned long (for example, 32-bit implementations cannot support a 4GB
+ * size).
+ */
+static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
+ unsigned long size, unsigned long flags, unsigned int pid)
+{
+ unsigned int tsize;
+
+ tsize = __ilog2(size) - 10;
+
+#if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC)
+ if ((flags & _PAGE_NO_CACHE) == 0)
+ flags |= _PAGE_COHERENT;
+#endif
+
+ TLBCAM[index].MAS0 = MAS0_TLBSEL(1) | MAS0_ESEL(index) | MAS0_NV(index+1);
+ TLBCAM[index].MAS1 = MAS1_VALID | MAS1_IPROT | MAS1_TSIZE(tsize) | MAS1_TID(pid);
+ TLBCAM[index].MAS2 = virt & PAGE_MASK;
+
+ TLBCAM[index].MAS2 |= (flags & _PAGE_WRITETHRU) ? MAS2_W : 0;
+ TLBCAM[index].MAS2 |= (flags & _PAGE_NO_CACHE) ? MAS2_I : 0;
+ TLBCAM[index].MAS2 |= (flags & _PAGE_COHERENT) ? MAS2_M : 0;
+ TLBCAM[index].MAS2 |= (flags & _PAGE_GUARDED) ? MAS2_G : 0;
+ TLBCAM[index].MAS2 |= (flags & _PAGE_ENDIAN) ? MAS2_E : 0;
+
+ TLBCAM[index].MAS3 = (phys & MAS3_RPN) | MAS3_SX | MAS3_SR;
+ TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_SW : 0);
+ if (mmu_has_feature(MMU_FTR_BIG_PHYS))
+ TLBCAM[index].MAS7 = (u64)phys >> 32;
+
+ /* Below is unlikely -- only for large user pages or similar */
+ if (pte_user(__pte(flags))) {
+ TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
+ TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
+ }
+
+ tlbcam_addrs[index].start = virt;
+ tlbcam_addrs[index].limit = virt + size - 1;
+ tlbcam_addrs[index].phys = phys;
+}
+
+unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
+ phys_addr_t phys)
+{
+ unsigned int camsize = __ilog2(ram);
+ unsigned int align = __ffs(virt | phys);
+ unsigned long max_cam;
+
+ if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1) {
+ /* Convert (4^max) kB to (2^max) bytes */
+ max_cam = ((mfspr(SPRN_TLB1CFG) >> 16) & 0xf) * 2 + 10;
+ camsize &= ~1U;
+ align &= ~1U;
+ } else {
+ /* Convert (2^max) kB to (2^max) bytes */
+ max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 10;
+ }
+
+ if (camsize > align)
+ camsize = align;
+ if (camsize > max_cam)
+ camsize = max_cam;
+
+ return 1UL << camsize;
+}
+
+static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
+ unsigned long ram, int max_cam_idx,
+ bool dryrun)
+{
+ int i;
+ unsigned long amount_mapped = 0;
+
+ /* Calculate CAM values */
+ for (i = 0; ram && i < max_cam_idx; i++) {
+ unsigned long cam_sz;
+
+ cam_sz = calc_cam_sz(ram, virt, phys);
+ if (!dryrun)
+ settlbcam(i, virt, phys, cam_sz,
+ pgprot_val(PAGE_KERNEL_X), 0);
+
+ ram -= cam_sz;
+ amount_mapped += cam_sz;
+ virt += cam_sz;
+ phys += cam_sz;
+ }
+
+ if (dryrun)
+ return amount_mapped;
+
+ loadcam_multi(0, i, max_cam_idx);
+ tlbcam_index = i;
+
+#ifdef CONFIG_PPC64
+ get_paca()->tcd.esel_next = i;
+ get_paca()->tcd.esel_max = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
+ get_paca()->tcd.esel_first = i;
+#endif
+
+ return amount_mapped;
+}
+
+unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, bool dryrun)
+{
+ unsigned long virt = PAGE_OFFSET;
+ phys_addr_t phys = memstart_addr;
+
+ return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx, dryrun);
+}
+
+#ifdef CONFIG_PPC32
+
+#if defined(CONFIG_LOWMEM_CAM_NUM_BOOL) && (CONFIG_LOWMEM_CAM_NUM >= NUM_TLBCAMS)
+#error "LOWMEM_CAM_NUM must be less than NUM_TLBCAMS"
+#endif
+
+unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
+{
+ return tlbcam_addrs[tlbcam_index - 1].limit - PAGE_OFFSET + 1;
+}
+
+void flush_instruction_cache(void)
+{
+ unsigned long tmp;
+
+ tmp = mfspr(SPRN_L1CSR1);
+ tmp |= L1CSR1_ICFI | L1CSR1_ICLFR;
+ mtspr(SPRN_L1CSR1, tmp);
+ isync();
+}
+
+/*
+ * MMU_init_hw does the chip-specific initialization of the MMU hardware.
+ */
+void __init MMU_init_hw(void)
+{
+ flush_instruction_cache();
+}
+
+void __init adjust_total_lowmem(void)
+{
+ unsigned long ram;
+ int i;
+
+ /* adjust lowmem size to __max_low_memory */
+ ram = min((phys_addr_t)__max_low_memory, (phys_addr_t)total_lowmem);
+
+ i = switch_to_as1();
+ __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, false);
+ restore_to_as0(i, 0, 0, 1);
+
+ pr_info("Memory CAM mapping: ");
+ for (i = 0; i < tlbcam_index - 1; i++)
+ pr_cont("%lu/", tlbcam_sz(i) >> 20);
+ pr_cont("%lu Mb, residual: %dMb\n", tlbcam_sz(tlbcam_index - 1) >> 20,
+ (unsigned int)((total_lowmem - __max_low_memory) >> 20));
+
+ memblock_set_current_limit(memstart_addr + __max_low_memory);
+}
+
+void setup_initial_memory_limit(phys_addr_t first_memblock_base,
+ phys_addr_t first_memblock_size)
+{
+ phys_addr_t limit = first_memblock_base + first_memblock_size;
+
+ /* 64M mapped initially according to head_fsl_booke.S */
+ memblock_set_current_limit(min_t(u64, limit, 0x04000000));
+}
+
+#ifdef CONFIG_RELOCATABLE
+int __initdata is_second_reloc;
+notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start)
+{
+ unsigned long base = kernstart_virt_addr;
+ phys_addr_t size;
+
+ kernstart_addr = start;
+ if (is_second_reloc) {
+ virt_phys_offset = PAGE_OFFSET - memstart_addr;
+ kaslr_late_init();
+ return;
+ }
+
+ /*
+ * Relocatable kernel support based on processing of dynamic
+ * relocation entries. Before we get the real memstart_addr,
+ * We will compute the virt_phys_offset like this:
+ * virt_phys_offset = stext.run - kernstart_addr
+ *
+ * stext.run = (KERNELBASE & ~0x3ffffff) +
+ * (kernstart_addr & 0x3ffffff)
+ * When we relocate, we have :
+ *
+ * (kernstart_addr & 0x3ffffff) = (stext.run & 0x3ffffff)
+ *
+ * hence:
+ * virt_phys_offset = (KERNELBASE & ~0x3ffffff) -
+ * (kernstart_addr & ~0x3ffffff)
+ *
+ */
+ start &= ~0x3ffffff;
+ base &= ~0x3ffffff;
+ virt_phys_offset = base - start;
+ early_get_first_memblock_info(__va(dt_ptr), &size);
+ /*
+ * We now get the memstart_addr, then we should check if this
+ * address is the same as what the PAGE_OFFSET map to now. If
+ * not we have to change the map of PAGE_OFFSET to memstart_addr
+ * and do a second relocation.
+ */
+ if (start != memstart_addr) {
+ int n;
+ long offset = start - memstart_addr;
+
+ is_second_reloc = 1;
+ n = switch_to_as1();
+ /* map a 64M area for the second relocation */
+ if (memstart_addr > start)
+ map_mem_in_cams(0x4000000, CONFIG_LOWMEM_CAM_NUM,
+ false);
+ else
+ map_mem_in_cams_addr(start, PAGE_OFFSET + offset,
+ 0x4000000, CONFIG_LOWMEM_CAM_NUM,
+ false);
+ restore_to_as0(n, offset, __va(dt_ptr), 1);
+ /* We should never reach here */
+ panic("Relocation error");
+ }
+
+ kaslr_early_init(__va(dt_ptr), size);
+}
+#endif
+#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Modifications by Kumar Gala (galak@kernel.crashing.org) to support
- * E500 Book E processors.
- *
- * Copyright 2004,2010 Freescale Semiconductor, Inc.
- *
- * This file contains the routines for initializing the MMU
- * on the 4xx series of chips.
- * -- paulus
- *
- * Derived from arch/ppc/mm/init.c:
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
- * and Cort Dougan (PReP) (cort@cs.nmt.edu)
- * Copyright (C) 1996 Paul Mackerras
- *
- * Derived from "arch/i386/mm/init.c"
- * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
- */
-
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/stddef.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/highmem.h>
-#include <linux/memblock.h>
-
-#include <asm/prom.h>
-#include <asm/io.h>
-#include <asm/mmu_context.h>
-#include <asm/mmu.h>
-#include <linux/uaccess.h>
-#include <asm/smp.h>
-#include <asm/machdep.h>
-#include <asm/setup.h>
-#include <asm/paca.h>
-
-#include <mm/mmu_decl.h>
-
-unsigned int tlbcam_index;
-
-#define NUM_TLBCAMS (64)
-struct tlbcam TLBCAM[NUM_TLBCAMS];
-
-struct tlbcamrange {
- unsigned long start;
- unsigned long limit;
- phys_addr_t phys;
-} tlbcam_addrs[NUM_TLBCAMS];
-
-unsigned long tlbcam_sz(int idx)
-{
- return tlbcam_addrs[idx].limit - tlbcam_addrs[idx].start + 1;
-}
-
-#ifdef CONFIG_FSL_BOOKE
-/*
- * Return PA for this VA if it is mapped by a CAM, or 0
- */
-phys_addr_t v_block_mapped(unsigned long va)
-{
- int b;
- for (b = 0; b < tlbcam_index; ++b)
- if (va >= tlbcam_addrs[b].start && va < tlbcam_addrs[b].limit)
- return tlbcam_addrs[b].phys + (va - tlbcam_addrs[b].start);
- return 0;
-}
-
-/*
- * Return VA for a given PA or 0 if not mapped
- */
-unsigned long p_block_mapped(phys_addr_t pa)
-{
- int b;
- for (b = 0; b < tlbcam_index; ++b)
- if (pa >= tlbcam_addrs[b].phys
- && pa < (tlbcam_addrs[b].limit-tlbcam_addrs[b].start)
- +tlbcam_addrs[b].phys)
- return tlbcam_addrs[b].start+(pa-tlbcam_addrs[b].phys);
- return 0;
-}
-#endif
-
-/*
- * Set up a variable-size TLB entry (tlbcam). The parameters are not checked;
- * in particular size must be a power of 4 between 4k and the max supported by
- * an implementation; max may further be limited by what can be represented in
- * an unsigned long (for example, 32-bit implementations cannot support a 4GB
- * size).
- */
-static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
- unsigned long size, unsigned long flags, unsigned int pid)
-{
- unsigned int tsize;
-
- tsize = __ilog2(size) - 10;
-
-#if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC)
- if ((flags & _PAGE_NO_CACHE) == 0)
- flags |= _PAGE_COHERENT;
-#endif
-
- TLBCAM[index].MAS0 = MAS0_TLBSEL(1) | MAS0_ESEL(index) | MAS0_NV(index+1);
- TLBCAM[index].MAS1 = MAS1_VALID | MAS1_IPROT | MAS1_TSIZE(tsize) | MAS1_TID(pid);
- TLBCAM[index].MAS2 = virt & PAGE_MASK;
-
- TLBCAM[index].MAS2 |= (flags & _PAGE_WRITETHRU) ? MAS2_W : 0;
- TLBCAM[index].MAS2 |= (flags & _PAGE_NO_CACHE) ? MAS2_I : 0;
- TLBCAM[index].MAS2 |= (flags & _PAGE_COHERENT) ? MAS2_M : 0;
- TLBCAM[index].MAS2 |= (flags & _PAGE_GUARDED) ? MAS2_G : 0;
- TLBCAM[index].MAS2 |= (flags & _PAGE_ENDIAN) ? MAS2_E : 0;
-
- TLBCAM[index].MAS3 = (phys & MAS3_RPN) | MAS3_SX | MAS3_SR;
- TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_SW : 0);
- if (mmu_has_feature(MMU_FTR_BIG_PHYS))
- TLBCAM[index].MAS7 = (u64)phys >> 32;
-
- /* Below is unlikely -- only for large user pages or similar */
- if (pte_user(__pte(flags))) {
- TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
- TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
- }
-
- tlbcam_addrs[index].start = virt;
- tlbcam_addrs[index].limit = virt + size - 1;
- tlbcam_addrs[index].phys = phys;
-}
-
-unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
- phys_addr_t phys)
-{
- unsigned int camsize = __ilog2(ram);
- unsigned int align = __ffs(virt | phys);
- unsigned long max_cam;
-
- if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1) {
- /* Convert (4^max) kB to (2^max) bytes */
- max_cam = ((mfspr(SPRN_TLB1CFG) >> 16) & 0xf) * 2 + 10;
- camsize &= ~1U;
- align &= ~1U;
- } else {
- /* Convert (2^max) kB to (2^max) bytes */
- max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 10;
- }
-
- if (camsize > align)
- camsize = align;
- if (camsize > max_cam)
- camsize = max_cam;
-
- return 1UL << camsize;
-}
-
-static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
- unsigned long ram, int max_cam_idx,
- bool dryrun)
-{
- int i;
- unsigned long amount_mapped = 0;
-
- /* Calculate CAM values */
- for (i = 0; ram && i < max_cam_idx; i++) {
- unsigned long cam_sz;
-
- cam_sz = calc_cam_sz(ram, virt, phys);
- if (!dryrun)
- settlbcam(i, virt, phys, cam_sz,
- pgprot_val(PAGE_KERNEL_X), 0);
-
- ram -= cam_sz;
- amount_mapped += cam_sz;
- virt += cam_sz;
- phys += cam_sz;
- }
-
- if (dryrun)
- return amount_mapped;
-
- loadcam_multi(0, i, max_cam_idx);
- tlbcam_index = i;
-
-#ifdef CONFIG_PPC64
- get_paca()->tcd.esel_next = i;
- get_paca()->tcd.esel_max = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
- get_paca()->tcd.esel_first = i;
-#endif
-
- return amount_mapped;
-}
-
-unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, bool dryrun)
-{
- unsigned long virt = PAGE_OFFSET;
- phys_addr_t phys = memstart_addr;
-
- return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx, dryrun);
-}
-
-#ifdef CONFIG_PPC32
-
-#if defined(CONFIG_LOWMEM_CAM_NUM_BOOL) && (CONFIG_LOWMEM_CAM_NUM >= NUM_TLBCAMS)
-#error "LOWMEM_CAM_NUM must be less than NUM_TLBCAMS"
-#endif
-
-unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
-{
- return tlbcam_addrs[tlbcam_index - 1].limit - PAGE_OFFSET + 1;
-}
-
-void flush_instruction_cache(void)
-{
- unsigned long tmp;
-
- tmp = mfspr(SPRN_L1CSR1);
- tmp |= L1CSR1_ICFI | L1CSR1_ICLFR;
- mtspr(SPRN_L1CSR1, tmp);
- isync();
-}
-
-/*
- * MMU_init_hw does the chip-specific initialization of the MMU hardware.
- */
-void __init MMU_init_hw(void)
-{
- flush_instruction_cache();
-}
-
-void __init adjust_total_lowmem(void)
-{
- unsigned long ram;
- int i;
-
- /* adjust lowmem size to __max_low_memory */
- ram = min((phys_addr_t)__max_low_memory, (phys_addr_t)total_lowmem);
-
- i = switch_to_as1();
- __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, false);
- restore_to_as0(i, 0, 0, 1);
-
- pr_info("Memory CAM mapping: ");
- for (i = 0; i < tlbcam_index - 1; i++)
- pr_cont("%lu/", tlbcam_sz(i) >> 20);
- pr_cont("%lu Mb, residual: %dMb\n", tlbcam_sz(tlbcam_index - 1) >> 20,
- (unsigned int)((total_lowmem - __max_low_memory) >> 20));
-
- memblock_set_current_limit(memstart_addr + __max_low_memory);
-}
-
-void setup_initial_memory_limit(phys_addr_t first_memblock_base,
- phys_addr_t first_memblock_size)
-{
- phys_addr_t limit = first_memblock_base + first_memblock_size;
-
- /* 64M mapped initially according to head_fsl_booke.S */
- memblock_set_current_limit(min_t(u64, limit, 0x04000000));
-}
-
-#ifdef CONFIG_RELOCATABLE
-int __initdata is_second_reloc;
-notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start)
-{
- unsigned long base = kernstart_virt_addr;
- phys_addr_t size;
-
- kernstart_addr = start;
- if (is_second_reloc) {
- virt_phys_offset = PAGE_OFFSET - memstart_addr;
- kaslr_late_init();
- return;
- }
-
- /*
- * Relocatable kernel support based on processing of dynamic
- * relocation entries. Before we get the real memstart_addr,
- * We will compute the virt_phys_offset like this:
- * virt_phys_offset = stext.run - kernstart_addr
- *
- * stext.run = (KERNELBASE & ~0x3ffffff) +
- * (kernstart_addr & 0x3ffffff)
- * When we relocate, we have :
- *
- * (kernstart_addr & 0x3ffffff) = (stext.run & 0x3ffffff)
- *
- * hence:
- * virt_phys_offset = (KERNELBASE & ~0x3ffffff) -
- * (kernstart_addr & ~0x3ffffff)
- *
- */
- start &= ~0x3ffffff;
- base &= ~0x3ffffff;
- virt_phys_offset = base - start;
- early_get_first_memblock_info(__va(dt_ptr), &size);
- /*
- * We now get the memstart_addr, then we should check if this
- * address is the same as what the PAGE_OFFSET map to now. If
- * not we have to change the map of PAGE_OFFSET to memstart_addr
- * and do a second relocation.
- */
- if (start != memstart_addr) {
- int n;
- long offset = start - memstart_addr;
-
- is_second_reloc = 1;
- n = switch_to_as1();
- /* map a 64M area for the second relocation */
- if (memstart_addr > start)
- map_mem_in_cams(0x4000000, CONFIG_LOWMEM_CAM_NUM,
- false);
- else
- map_mem_in_cams_addr(start, PAGE_OFFSET + offset,
- 0x4000000, CONFIG_LOWMEM_CAM_NUM,
- false);
- restore_to_as0(n, offset, __va(dt_ptr), 1);
- /* We should never reach here */
- panic("Relocation error");
- }
-
- kaslr_early_init(__va(dt_ptr), size);
-}
-#endif
-#endif
projects / linux-2.6-microblaze.git / commitdiff