diff options
Diffstat (limited to 'sys/kern/entry.S')
| -rw-r--r-- | sys/kern/entry.S | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/sys/kern/entry.S b/sys/kern/entry.S index fccd80f..03ff76c 100644 --- a/sys/kern/entry.S +++ b/sys/kern/entry.S @@ -2,6 +2,7 @@ .globl _start _start: + /* disable interrupts and poging */ csrw satp, zero csrw sie, zero csrw sip, zero @@ -11,33 +12,42 @@ _start: la gp, __global_pointer$ .option pop + /* setup stack */ addi t0, a0, 1 li t1, PAGE_SIZE la sp, __stack_start mul t1, t1, t0 add sp, sp, t1 + /* setup thread pointer */ + mv tp, a0 + + /* the label _boot_hart is shared between threads. only one hart will branch before it is no longer 0 */ li a2, 1 lla a3, _boot_hart amoswap.w a3, a2, (a3) - bnez a3, _spin + bnez a3, 2f + /* clear the bss section */ la a2, __bss_start la a3, __bss_end 1: sd zero, (a2) addi a2, a2, __SIZEOF_POINTER__ blt a2, a3, 1b - +2: call init - + j _spin _spin: wfi j _spin .section ".data" -_boot_hart: .word 0 +_boot_hart: + .word 0 + .section ".rodata" +/* linker imports */ .globl HEAP_START HEAP_START: .dword __heap_start |