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[MIPS] 16K & 64K page size fixes

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Derived from Peter Watkins <treestem@gmail.com>'s work.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2006-10-24 02:29:01 +01:00
parent 4b1c46a383
commit 242954b5aa
11 changed files with 64 additions and 13 deletions
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30
arch/mips/mm/pg-r4k.c
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@@ -270,6 +270,20 @@ static inline void build_addiu_a2_a0(unsigned long offset)
emit_instruction(mi);
}
static inline void build_addiu_a2(unsigned long offset)
{
union mips_instruction mi;
BUG_ON(offset > 0x7fff);
mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
mi.i_format.rs = 6; /* $a2 */
mi.i_format.rt = 6; /* $a2 */
mi.i_format.simmediate = offset;
emit_instruction(mi);
}
static inline void build_addiu_a1(unsigned long offset)
{
union mips_instruction mi;
@@ -333,6 +347,7 @@ static inline void build_jr_ra(void)
void __init build_clear_page(void)
{
unsigned int loop_start;
unsigned long off;
epc = (unsigned int *) &clear_page_array;
instruction_pending = 0;
@@ -369,7 +384,12 @@ void __init build_clear_page(void)
}
}
build_addiu_a2_a0(PAGE_SIZE - (cpu_has_prefetch ? pref_offset_clear : 0));
off = PAGE_SIZE - (cpu_has_prefetch ? pref_offset_clear : 0);
if (off > 0x7fff) {
build_addiu_a2_a0(off >> 1);
build_addiu_a2(off >> 1);
} else
build_addiu_a2_a0(off);
if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
build_insn_word(0x3c01a000); /* lui $at, 0xa000 */
@@ -420,12 +440,18 @@ dest = label();
void __init build_copy_page(void)
{
unsigned int loop_start;
unsigned long off;
epc = (unsigned int *) &copy_page_array;
store_offset = load_offset = 0;
instruction_pending = 0;
build_addiu_a2_a0(PAGE_SIZE - (cpu_has_prefetch ? pref_offset_copy : 0));
off = PAGE_SIZE - (cpu_has_prefetch ? pref_offset_copy : 0);
if (off > 0x7fff) {
build_addiu_a2_a0(off >> 1);
build_addiu_a2(off >> 1);
} else
build_addiu_a2_a0(off);
if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
build_insn_word(0x3c01a000); /* lui $at, 0xa000 */