summaryrefslogtreecommitdiffstats
path: root/arch/tile/kernel/relocate_kernel_32.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/kernel/relocate_kernel_32.S')
-rw-r--r--arch/tile/kernel/relocate_kernel_32.S269
1 files changed, 0 insertions, 269 deletions
diff --git a/arch/tile/kernel/relocate_kernel_32.S b/arch/tile/kernel/relocate_kernel_32.S
deleted file mode 100644
index e44fbcf8cbd5..000000000000
--- a/arch/tile/kernel/relocate_kernel_32.S
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- *
- * copy new kernel into place and then call hv_reexec
- *
- */
-
-#include <linux/linkage.h>
-#include <arch/chip.h>
-#include <asm/page.h>
-#include <hv/hypervisor.h>
-
-#undef RELOCATE_NEW_KERNEL_VERBOSE
-
-STD_ENTRY(relocate_new_kernel)
-
- move r30, r0 /* page list */
- move r31, r1 /* address of page we are on */
- move r32, r2 /* start address of new kernel */
-
- shri r1, r1, PAGE_SHIFT
- addi r1, r1, 1
- shli sp, r1, PAGE_SHIFT
- addi sp, sp, -8
- /* we now have a stack (whether we need one or not) */
-
- moveli r40, lo16(hv_console_putc)
- auli r40, r40, ha16(hv_console_putc)
-
-#ifdef RELOCATE_NEW_KERNEL_VERBOSE
- moveli r0, 'r'
- jalr r40
-
- moveli r0, '_'
- jalr r40
-
- moveli r0, 'n'
- jalr r40
-
- moveli r0, '_'
- jalr r40
-
- moveli r0, 'k'
- jalr r40
-
- moveli r0, '\n'
- jalr r40
-#endif
-
- /*
- * Throughout this code r30 is pointer to the element of page
- * list we are working on.
- *
- * Normally we get to the next element of the page list by
- * incrementing r30 by four. The exception is if the element
- * on the page list is an IND_INDIRECTION in which case we use
- * the element with the low bits masked off as the new value
- * of r30.
- *
- * To get this started, we need the value passed to us (which
- * will always be an IND_INDIRECTION) in memory somewhere with
- * r30 pointing at it. To do that, we push the value passed
- * to us on the stack and make r30 point to it.
- */
-
- sw sp, r30
- move r30, sp
- addi sp, sp, -8
-
- /*
- * On TILEPro, we need to flush all tiles' caches, since we may
- * have been doing hash-for-home caching there. Note that we
- * must do this _after_ we're completely done modifying any memory
- * other than our output buffer (which we know is locally cached).
- * We want the caches to be fully clean when we do the reexec,
- * because the hypervisor is going to do this flush again at that
- * point, and we don't want that second flush to overwrite any memory.
- */
- {
- move r0, zero /* cache_pa */
- move r1, zero
- }
- {
- auli r2, zero, ha16(HV_FLUSH_EVICT_L2) /* cache_control */
- movei r3, -1 /* cache_cpumask; -1 means all client tiles */
- }
- {
- move r4, zero /* tlb_va */
- move r5, zero /* tlb_length */
- }
- {
- move r6, zero /* tlb_pgsize */
- move r7, zero /* tlb_cpumask */
- }
- {
- move r8, zero /* asids */
- moveli r20, lo16(hv_flush_remote)
- }
- {
- move r9, zero /* asidcount */
- auli r20, r20, ha16(hv_flush_remote)
- }
-
- jalr r20
-
- /* r33 is destination pointer, default to zero */
-
- moveli r33, 0
-
-.Lloop: lw r10, r30
-
- andi r9, r10, 0xf /* low 4 bits tell us what type it is */
- xor r10, r10, r9 /* r10 is now value with low 4 bits stripped */
-
- seqi r0, r9, 0x1 /* IND_DESTINATION */
- bzt r0, .Ltry2
-
- move r33, r10
-
-#ifdef RELOCATE_NEW_KERNEL_VERBOSE
- moveli r0, 'd'
- jalr r40
-#endif
-
- addi r30, r30, 4
- j .Lloop
-
-.Ltry2:
- seqi r0, r9, 0x2 /* IND_INDIRECTION */
- bzt r0, .Ltry4
-
- move r30, r10
-
-#ifdef RELOCATE_NEW_KERNEL_VERBOSE
- moveli r0, 'i'
- jalr r40
-#endif
-
- j .Lloop
-
-.Ltry4:
- seqi r0, r9, 0x4 /* IND_DONE */
- bzt r0, .Ltry8
-
- mf
-
-#ifdef RELOCATE_NEW_KERNEL_VERBOSE
- moveli r0, 'D'
- jalr r40
- moveli r0, '\n'
- jalr r40
-#endif
-
- move r0, r32
- moveli r1, 0 /* arg to hv_reexec is 64 bits */
-
- moveli r41, lo16(hv_reexec)
- auli r41, r41, ha16(hv_reexec)
-
- jalr r41
-
- /* we should not get here */
-
- moveli r0, '?'
- jalr r40
- moveli r0, '\n'
- jalr r40
-
- j .Lhalt
-
-.Ltry8: seqi r0, r9, 0x8 /* IND_SOURCE */
- bz r0, .Lerr /* unknown type */
-
- /* copy page at r10 to page at r33 */
-
- move r11, r33
-
- moveli r0, lo16(PAGE_SIZE)
- auli r0, r0, ha16(PAGE_SIZE)
- add r33, r33, r0
-
- /* copy word at r10 to word at r11 until r11 equals r33 */
-
- /* We know page size must be multiple of 16, so we can unroll
- * 16 times safely without any edge case checking.
- *
- * Issue a flush of the destination every 16 words to avoid
- * incoherence when starting the new kernel. (Now this is
- * just good paranoia because the hv_reexec call will also
- * take care of this.)
- */
-
-1:
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0; addi r11, r11, 4 }
- { lw r0, r10; addi r10, r10, 4 }
- { sw r11, r0 }
- { flush r11 ; addi r11, r11, 4 }
-
- seq r0, r33, r11
- bzt r0, 1b
-
-#ifdef RELOCATE_NEW_KERNEL_VERBOSE
- moveli r0, 's'
- jalr r40
-#endif
-
- addi r30, r30, 4
- j .Lloop
-
-
-.Lerr: moveli r0, 'e'
- jalr r40
- moveli r0, 'r'
- jalr r40
- moveli r0, 'r'
- jalr r40
- moveli r0, '\n'
- jalr r40
-.Lhalt:
- moveli r41, lo16(hv_halt)
- auli r41, r41, ha16(hv_halt)
-
- jalr r41
- STD_ENDPROC(relocate_new_kernel)
-
- .section .rodata,"a"
-
- .globl relocate_new_kernel_size
-relocate_new_kernel_size:
- .long .Lend_relocate_new_kernel - relocate_new_kernel