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Diffstat (limited to 'arch/tile/kernel/head_64.S')
-rw-r--r--arch/tile/kernel/head_64.S46
1 files changed, 25 insertions, 21 deletions
diff --git a/arch/tile/kernel/head_64.S b/arch/tile/kernel/head_64.S
index 6093964fa5c7..bd0e12f283f3 100644
--- a/arch/tile/kernel/head_64.S
+++ b/arch/tile/kernel/head_64.S
@@ -25,6 +25,15 @@
#include <arch/chip.h>
#include <arch/spr_def.h>
+/* Extract two 32-bit bit values that were read into one register. */
+#ifdef __BIG_ENDIAN__
+#define GET_FIRST_INT(rd, rs) shrsi rd, rs, 32
+#define GET_SECOND_INT(rd, rs) addxi rd, rs, 0
+#else
+#define GET_FIRST_INT(rd, rs) addxi rd, rs, 0
+#define GET_SECOND_INT(rd, rs) shrsi rd, rs, 32
+#endif
+
/*
* This module contains the entry code for kernel images. It performs the
* minimal setup needed to call the generic C routines.
@@ -46,11 +55,11 @@ ENTRY(_start)
movei r2, TILE_CHIP_REV
movei r3, KERNEL_PL
}
- jal hv_init
+ jal _hv_init
/* Get a reasonable default ASID in r0 */
{
move r0, zero
- jal hv_inquire_asid
+ jal _hv_inquire_asid
}
/*
@@ -61,7 +70,7 @@ ENTRY(_start)
* other CPUs should see a properly-constructed page table.
*/
{
- v4int_l r2, zero, r0 /* ASID for hv_install_context */
+ GET_FIRST_INT(r2, r0) /* ASID for hv_install_context */
moveli r4, hw1_last(swapper_pgprot - PAGE_OFFSET)
}
{
@@ -77,7 +86,7 @@ ENTRY(_start)
{
/* After initializing swapper_pgprot, HV_PTE_GLOBAL is set. */
bfextu r7, r1, HV_PTE_INDEX_GLOBAL, HV_PTE_INDEX_GLOBAL
- inv r4
+ finv r4
}
bnez r7, .Lno_write
{
@@ -121,29 +130,24 @@ ENTRY(_start)
}
{
moveli r3, CTX_PAGE_FLAG
- j hv_install_context
+ j _hv_install_context
}
1:
/* Install the interrupt base. */
- moveli r0, hw2_last(MEM_SV_START)
- shl16insli r0, r0, hw1(MEM_SV_START)
- shl16insli r0, r0, hw0(MEM_SV_START)
+ moveli r0, hw2_last(intrpt_start)
+ shl16insli r0, r0, hw1(intrpt_start)
+ shl16insli r0, r0, hw0(intrpt_start)
mtspr SPR_INTERRUPT_VECTOR_BASE_K, r0
- /*
- * Get our processor number and save it away in SAVE_K_0.
- * Extract stuff from the topology structure: r4 = y, r6 = x,
- * r5 = width. FIXME: consider whether we want to just make these
- * 64-bit values (and if so fix smp_topology write below, too).
- */
- jal hv_inquire_topology
+ /* Get our processor number and save it away in SAVE_K_0. */
+ jal _hv_inquire_topology
{
- v4int_l r5, zero, r1 /* r5 = width */
- shrui r4, r0, 32 /* r4 = y */
+ GET_FIRST_INT(r5, r1) /* r5 = width */
+ GET_SECOND_INT(r4, r0) /* r4 = y */
}
{
- v4int_l r6, zero, r0 /* r6 = x */
+ GET_FIRST_INT(r6, r0) /* r6 = x */
mul_lu_lu r4, r4, r5
}
{
@@ -154,7 +158,7 @@ ENTRY(_start)
/*
* Load up our per-cpu offset. When the first (master) tile
* boots, this value is still zero, so we will load boot_pc
- * with start_kernel, and boot_sp with init_stack + THREAD_SIZE.
+ * with start_kernel, and boot_sp with at the top of init_stack.
* The master tile initializes the per-cpu offset array, so that
* when subsequent (secondary) tiles boot, they will instead load
* from their per-cpu versions of boot_sp and boot_pc.
@@ -198,9 +202,9 @@ ENTRY(_start)
}
ld r0, r0
ld sp, r1
- or r4, sp, r4
+ shli r4, r4, CPU_SHIFT
+ bfins r4, sp, 0, CPU_SHIFT-1
mtspr SPR_SYSTEM_SAVE_K_0, r4 /* save ksp0 + cpu */
- addi sp, sp, -STACK_TOP_DELTA
{
move lr, zero /* stop backtraces in the called function */
jr r0