This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / platforms / cell / spufs / spu_save_crt0.S

diff --git a/arch/powerpc/platforms/cell/spufs/spu_save_crt0.S b/arch/powerpc/platforms/cell/spufs/spu_save_crt0.S
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+++ b/arch/powerpc/platforms/cell/spufs/spu_save_crt0.S
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+/*
+ * crt0_s.S: Entry function for SPU-side context save.
+ *
+ * Copyright (C) 2005 IBM
+ *
+ * Entry function for SPU-side of the context save sequence.
+ * Saves all 128 GPRs, sets up an initial stack frame, then
+ * branches to 'main'.
+ *
+ *
+ * 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; either version 2, or (at your option)
+ * any later version.
+ *
+ * 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. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <asm/spu_csa.h>
+
+.data
+.align 7
+.globl regs_spill
+regs_spill:
+.space SIZEOF_SPU_SPILL_REGS, 0x0
+
+.text
+.global _start
+_start:
+       /* SPU Context Save Step 1: Save the first 16 GPRs. */
+       stqa $0, regs_spill + 0
+       stqa $1, regs_spill + 16
+       stqa $2, regs_spill + 32
+       stqa $3, regs_spill + 48
+       stqa $4, regs_spill + 64
+       stqa $5, regs_spill + 80
+       stqa $6, regs_spill + 96
+       stqa $7, regs_spill + 112
+       stqa $8, regs_spill + 128
+       stqa $9, regs_spill + 144
+       stqa $10, regs_spill + 160
+       stqa $11, regs_spill + 176
+       stqa $12, regs_spill + 192
+       stqa $13, regs_spill + 208
+       stqa $14, regs_spill + 224
+       stqa $15, regs_spill + 240
+
+       /* SPU Context Save, Step 8: Save the remaining 112 GPRs. */
+       ila     $3, regs_spill + 256
+save_regs:
+       lqr     $4, save_reg_insts
+save_reg_loop:
+       ai      $4, $4, 4
+       .balignl 16, 0x40200000
+save_reg_insts:       /* must be quad-word aligned. */
+       stqd    $16, 0($3)
+       stqd    $17, 16($3)
+       stqd    $18, 32($3)
+       stqd    $19, 48($3)
+       andi    $5, $4, 0x7F
+       stqr    $4, save_reg_insts
+       ai      $3, $3, 64
+       brnz    $5, save_reg_loop
+
+       /* Initialize the stack pointer to point to 16368
+        * (16kb-16). The back chain pointer is initialized
+        * to NULL.
+        */
+       il      $0, 0
+       il      $SP, 16368
+       stqd    $0, 0($SP)
+
+       /* Allocate a minimum stack frame for the called main.
+        * This is needed so that main has a place to save the
+        * link register when it calls another function.
+        */
+       stqd    $SP, -160($SP)
+       ai      $SP, $SP, -160
+
+       /* Call the program's main function. */
+       brsl    $0, main
+
+       /* In this case main should not return; if it does
+        * there has been an error in the sequence.  Execute
+        * stop-and-signal with code=0.
+        */
+.global exit
+.global        _exit
+exit:
+_exit:
+       stop    0x0
+
+       /* Pad the size of this crt0.o to be multiple of 16 bytes. */
+.balignl 16, 0x0
+