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[MIPS] 16K & 64K page size fixes 

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

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
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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2
arch/mips/kernel/asm-offsets.c
View File

@ -22,7 +22,7 @@
#define offset(string, ptr, member) \
__asm__("\n@@@" string "%0" : : "i" (_offset(ptr, member)))
#define constant(string, member) \
__asm__("\n@@@" string "%x0" : : "ri" (member))
__asm__("\n@@@" string "%X0" : : "ri" (member))
#define size(string, size) \
__asm__("\n@@@" string "%0" : : "i" (sizeof(size)))
#define linefeed text("")

3
arch/mips/kernel/head.S
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@ -189,7 +189,8 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
MTC0 zero, CP0_CONTEXT # clear context register
PTR_LA $28, init_thread_union
PTR_ADDIU sp, $28, _THREAD_SIZE - 32
PTR_LI sp, _THREAD_SIZE - 32
PTR_ADDU sp, $28
set_saved_sp sp, t0, t1
PTR_SUBU sp, 4 * SZREG # init stack pointer

5
arch/mips/kernel/r4k_switch.S
View File

@ -85,7 +85,12 @@
move $28, a2
cpu_restore_nonscratch a1
#if (_THREAD_SIZE - 32) < 0x10000
PTR_ADDIU t0, $28, _THREAD_SIZE - 32
#else
PTR_LI t0, _THREAD_SIZE - 32
PTR_ADDU t0, $28
#endif
set_saved_sp t0, t1, t2
#ifdef CONFIG_MIPS_MT_SMTC
/* Read-modify-writes of Status must be atomic on a VPE */

10
arch/mips/kernel/vmlinux.lds.S
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@ -50,6 +50,16 @@ SECTIONS
/* writeable */
.data : { /* Data */
. = . + DATAOFFSET; /* for CONFIG_MAPPED_KERNEL */
/*
* This ALIGN is needed as a workaround for a bug a gcc bug upto 4.1 which
* limits the maximum alignment to at most 32kB and results in the following
* warning:
*
* CC arch/mips/kernel/init_task.o
* arch/mips/kernel/init_task.c:30: warning: alignment of ‘init_thread_union’
* is greater than maximum object file alignment. Using 32768
*/
. = ALIGN(_PAGE_SIZE);
*(.data.init_task)
*(.data)

6
arch/mips/lib-64/dump_tlb.c
View File

@ -149,7 +149,7 @@ void dump_list_process(struct task_struct *t, void *address)
printk("Addr == %08lx\n", addr);
printk("tasks->mm.pgd == %08lx\n", (unsigned long) t->mm->pgd);
page_dir = pgd_offset(t->mm, 0);
page_dir = pgd_offset(t->mm, 0UL);
printk("page_dir == %016lx\n", (unsigned long) page_dir);
pgd = pgd_offset(t->mm, addr);
@ -184,13 +184,13 @@ void dump_list_current(void *address)
dump_list_process(current, address);
}
unsigned int vtop(void *address)
unsigned long vtop(void *address)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
unsigned int addr, paddr;
unsigned long addr, paddr;
addr = (unsigned long) address;
pgd = pgd_offset(current->mm, addr);

2
arch/mips/mips-boards/generic/memory.c
View File

@ -176,7 +176,7 @@ unsigned long __init prom_free_prom_memory(void)
if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
continue;
addr = boot_mem_map.map[i].addr;
addr = PAGE_ALIGN(boot_mem_map.map[i].addr);
while (addr < boot_mem_map.map[i].addr
+ boot_mem_map.map[i].size) {
ClearPageReserved(virt_to_page(__va(addr)));

30
arch/mips/mm/pg-r4k.c
View File

@ -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 */

13
arch/mips/mm/tlbex.c
View File

@ -102,7 +102,7 @@ enum opcode {
insn_addu, insn_addiu, insn_and, insn_andi, insn_beq,
insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
insn_bne, insn_daddu, insn_daddiu, insn_dmfc0, insn_dmtc0,
insn_dsll, insn_dsll32, insn_dsra, insn_dsrl,
insn_dsll, insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32,
insn_dsubu, insn_eret, insn_j, insn_jal, insn_jr, insn_ld,
insn_ll, insn_lld, insn_lui, insn_lw, insn_mfc0, insn_mtc0,
insn_ori, insn_rfe, insn_sc, insn_scd, insn_sd, insn_sll,
@ -145,6 +145,7 @@ static __initdata struct insn insn_table[] = {
{ insn_dsll32, M(spec_op,0,0,0,0,dsll32_op), RT | RD | RE },
{ insn_dsra, M(spec_op,0,0,0,0,dsra_op), RT | RD | RE },
{ insn_dsrl, M(spec_op,0,0,0,0,dsrl_op), RT | RD | RE },
{ insn_dsrl32, M(spec_op,0,0,0,0,dsrl32_op), RT | RD | RE },
{ insn_dsubu, M(spec_op,0,0,0,0,dsubu_op), RS | RT | RD },
{ insn_eret, M(cop0_op,cop_op,0,0,0,eret_op), 0 },
{ insn_j, M(j_op,0,0,0,0,0), JIMM },
@ -385,6 +386,7 @@ I_u2u1u3(_dsll);
I_u2u1u3(_dsll32);
I_u2u1u3(_dsra);
I_u2u1u3(_dsrl);
I_u2u1u3(_dsrl32);
I_u3u1u2(_dsubu);
I_0(_eret);
I_u1(_j);
@ -996,7 +998,12 @@ build_get_pmde64(u32 **p, struct label **l, struct reloc **r,
#endif
l_vmalloc_done(l, *p);
i_dsrl(p, tmp, tmp, PGDIR_SHIFT-3); /* get pgd offset in bytes */
if (PGDIR_SHIFT - 3 < 32) /* get pgd offset in bytes */
i_dsrl(p, tmp, tmp, PGDIR_SHIFT-3);
else
i_dsrl32(p, tmp, tmp, PGDIR_SHIFT - 3 - 32);
i_andi(p, tmp, tmp, (PTRS_PER_PGD - 1)<<3);
i_daddu(p, ptr, ptr, tmp); /* add in pgd offset */
i_dmfc0(p, tmp, C0_BADVADDR); /* get faulting address */
@ -1073,7 +1080,7 @@ build_get_pgde32(u32 **p, unsigned int tmp, unsigned int ptr)
static __init void build_adjust_context(u32 **p, unsigned int ctx)
{
unsigned int shift = 4 - (PTE_T_LOG2 + 1);
unsigned int shift = 4 - (PTE_T_LOG2 + 1) + PAGE_SHIFT - 12;
unsigned int mask = (PTRS_PER_PTE / 2 - 1) << (PTE_T_LOG2 + 1);
switch (current_cpu_data.cputype) {

2
include/asm-mips/asm.h
View File

@ -344,6 +344,7 @@ symbol = value
#define PTR_L lw
#define PTR_S sw
#define PTR_LA la
#define PTR_LI li
#define PTR_SLL sll
#define PTR_SLLV sllv
#define PTR_SRL srl
@ -368,6 +369,7 @@ symbol = value
#define PTR_L ld
#define PTR_S sd
#define PTR_LA dla
#define PTR_LI dli
#define PTR_SLL dsll
#define PTR_SLLV dsllv
#define PTR_SRL dsrl

2
include/asm-mips/pgalloc.h
View File

@ -48,7 +48,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
if (ret) {
init = pgd_offset(&init_mm, 0);
init = pgd_offset(&init_mm, 0UL);
pgd_init((unsigned long)ret);
memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));

2
include/asm-mips/pgtable-64.h
View File

@ -174,7 +174,7 @@ static inline void pud_clear(pud_t *pudp)
#define __pmd_offset(address) pmd_index(address)
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(address) pgd_offset(&init_mm, 0)
#define pgd_offset_k(address) pgd_offset(&init_mm, 0UL)
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))