#ifndef __ASSEMBLY__
/*
+ * Physical start and end address of the kernel sections. These addresses are
+ * 2MB-aligned to match the section mappings placed over the kernel.
+ */
+extern phys_addr_t kernel_sec_start;
+extern phys_addr_t kernel_sec_end;
+
+/*
* Physical vs virtual RAM address space conversion. These are
* private definitions which should NOT be used outside memory.h
* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
.globl swapper_pg_dir
.equ swapper_pg_dir, KERNEL_RAM_VADDR - PG_DIR_SIZE
+ /*
+ * This needs to be assigned at runtime when the linker symbols are
+ * resolved.
+ */
+ .pushsection .data
+ .align 2
+ .globl kernel_sec_start
+ .globl kernel_sec_end
+kernel_sec_start:
+ .long 0
+kernel_sec_end:
+ .long 0
+ .popsection
+
.macro pgtbl, rd, phys
add \rd, \phys, #TEXT_OFFSET
sub \rd, \rd, #PG_DIR_SIZE
blo 1b
/*
- * Map our RAM from the start to the end of the kernel .bss section.
+ * The main matter: map in the kernel using section mappings, and
+ * set two variables to indicate the physical start and end of the
+ * kernel.
*/
- add r0, r4, #PAGE_OFFSET >> (SECTION_SHIFT - PMD_ORDER)
+ add r0, r4, #KERNEL_OFFSET >> (SECTION_SHIFT - PMD_ORDER)
ldr r6, =(_end - 1)
- orr r3, r8, r7
+ adr_l r5, kernel_sec_start @ _pa(kernel_sec_start)
+ str r8, [r5] @ Save physical start of kernel
+ orr r3, r8, r7 @ Add the MMU flags
add r6, r4, r6, lsr #(SECTION_SHIFT - PMD_ORDER)
1: str r3, [r0], #1 << PMD_ORDER
add r3, r3, #1 << SECTION_SHIFT
cmp r0, r6
bls 1b
+ eor r3, r3, r7 @ Remove the MMU flags
+ adr_l r5, kernel_sec_end @ _pa(kernel_sec_end)
+ str r3, [r5] @ Save physical end of kernel
#ifdef CONFIG_XIP_KERNEL
/*