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arm-refactor:document ARM assembly code.

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Change-Id: I8540a09cdaf45431ad163954ce41d36f4b72cad5
This commit is contained in:
Kees Jongenburger
2014-02-10 13:12:21 +01:00
parent 9dec6c12f1
commit 3df19a0671
3 changed files with 73 additions and 67 deletions
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14
kernel/arch/earm/head.S
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@@ -28,20 +28,20 @@ MINIX:
b multiboot_init
multiboot_init:
ldr sp, =load_stack_start /* make usable stack */
ldr sp, =load_stack_start /* make usable stack */
mov fp, #0
bl _C_LABEL(pre_init)
/* Kernel is mapped high now and ready to go, with
* the boot info pointer returned in r0. Set the
* highly mapped stack, initialize it, push the boot
* info pointer and jump to the highly mapped kernel.
* the boot info pointer returned by pre_init in r0.
* Set the highly mapped stack and initialize it.
*
* Afther that call kmain with r0 still pointing to boot info
*/
ldr sp, =k_initial_stktop
mov r1, #0
push {r1} /* Terminate stack */
/* r0 holds kinfo_t ptr */
ldr r2, =_C_LABEL(kmain)
push {r1} /* Terminate stack */
ldr r2, =_C_LABEL(kmain) /* r0 holds kinfo_t ptr */
bx r2
/* not reached */