-/* $Id: head.S,v 1.87 2002/02/09 19:49:31 davem Exp $
- * head.S: Initial boot code for the Sparc64 port of Linux.
+/* head.S: Initial boot code for the Sparc64 port of Linux.
*
- * Copyright (C) 1996,1997 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996, 1997, 2007 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996 David Sitsky (David.Sitsky@anu.edu.au)
- * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997, 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
*/
#include <linux/version.h>
#include <linux/errno.h>
#include <linux/threads.h>
+#include <linux/init.h>
#include <asm/thread_info.h>
#include <asm/asi.h>
#include <asm/pstate.h>
/* PROM cif handler code address is in %o4. */
sparc64_boot:
-1: rd %pc, %g7
- set 1b, %g1
- cmp %g1, %g7
- be,pn %xcc, sparc64_boot_after_remap
- mov %o4, %l7
+ mov %o4, %l7
/* We need to remap the kernel. Use position independant
* code to remap us to KERNBASE.
add %sp, (192 + 128), %sp
-sparc64_boot_after_remap:
sethi %hi(prom_root_compatible), %g1
or %g1, %lo(prom_root_compatible), %g1
sethi %hi(prom_sun4v_name), %g7
jmpl %g2 + %g0, %g0
nop
+ .section .text.init.refok
sun4u_init:
BRANCH_IF_SUN4V(g1, sun4v_init)
or %g6, %lo(init_thread_union), %g6
ldx [%g6 + TI_TASK], %g4
mov %sp, %l6
- mov %o4, %l7
wr %g0, ASI_P, %asi
mov 1, %g1
#else
mov 0, %o0
#endif
- stb %o0, [%g6 + TI_CPU]
+ sth %o0, [%g6 + TI_CPU]
/* Off we go.... */
call start_kernel
nop
/* Not reached... */
+ .previous
+
/* This is meant to allow the sharing of this code between
* boot processor invocation (via setup_tba() below) and
* secondary processor startup (via trampoline.S). The
restore
sparc64_boot_end:
-#include "ktlb.S"
-#include "tsb.S"
#include "etrap.S"
#include "rtrap.S"
#include "winfixup.S"
#include "entry.S"
#include "sun4v_tlb_miss.S"
#include "sun4v_ivec.S"
+#include "ktlb.S"
+#include "tsb.S"
/*
* The following skip makes sure the trap table in ttable.S is aligned
* on a 32K boundary as required by the v9 specs for TBA register.
*
* We align to a 32K boundary, then we have the 32K kernel TSB,
- * then the 32K aligned trap table.
+ * the 64K kernel 4MB TSB, and then the 32K aligned trap table.
*/
1:
.skip 0x4000 + _start - 1b
+! 0x0000000000408000
+
.globl swapper_tsb
swapper_tsb:
.skip (32 * 1024)
-! 0x0000000000408000
+ .globl swapper_4m_tsb
+swapper_4m_tsb:
+ .skip (64 * 1024)
+
+! 0x0000000000420000
+ /* Some care needs to be exercised if you try to move the
+ * location of the trap table relative to other things. For
+ * one thing there are br* instructions in some of the
+ * trap table entires which branch back to code in ktlb.S
+ * Those instructions can only handle a signed 16-bit
+ * displacement.
+ *
+ * There is a binutils bug (bugzilla #4558) which causes
+ * the relocation overflow checks for such instructions to
+ * not be done correctly. So bintuils will not notice the
+ * error and will instead write junk into the relocation and
+ * you'll have an unbootable kernel.
+ */
#include "ttable.S"
+! 0x0000000000428000
+
#include "systbls.S"
.data