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Merge branch 'sparc32-cosmetic-changes'

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Sam Ravnborg says:

====================
sparc32: kgdb_32 and STRICT_MM_TYPECHECKS updates

A few cosmetic pathes for sparc32 follows.
I noticed some inconsistency in kgdb_32 that triggered a few patches.
The inconsistency in kgdb_32 turned out to have no functional impact.
But I anyway fixed it so kgdb_32 and kgdb_64 became just a tiny
bit more alike.

The STRICT_MM_TYPECHECKS patch was triggered by a
discussion on linux-arch where Arnd considered removing
this cruft.
The resulting benary of srmmu.c (I checked an assembler file)
was _smaller_ when I defined STRICT_MM_TYPECHECKS.
But due to lack of testing I left it undefined.
With the build errors fixed it should be trivial to
try out if defining STRICT_MM_TYPECHECKS breaks anything.

Any takers?

As I miss any working sparc32 gear for the moment this
has only been build tested - so please consider if it
is worth taking the risk to apply the patches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-05-20 17:55:51 -07:00
commit 20c698d779
11 changed files with 33 additions and 34 deletions
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8
arch/sparc/include/asm/head_32.h
View File

@ -43,10 +43,10 @@
nop;
#ifdef CONFIG_KGDB
#define KGDB_TRAP(num) \
b kgdb_trap_low; \
rd %psr,%l0; \
nop; \
#define KGDB_TRAP(num) \
mov num, %l7; \
b kgdb_trap_low; \
rd %psr,%l0; \
nop;
#else
#define KGDB_TRAP(num) \

2
arch/sparc/include/asm/kgdb.h
View File

@ -28,10 +28,10 @@ enum regnames {
#define NUMREGBYTES ((GDB_CSR + 1) * 4)
#else
#define NUMREGBYTES ((GDB_Y + 1) * 8)
#endif
struct pt_regs;
asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs);
#endif
void arch_kgdb_breakpoint(void);

2
arch/sparc/include/asm/page_32.h
View File

@ -69,7 +69,6 @@ typedef struct { unsigned long iopgprot; } iopgprot_t;
#define __pte(x) ((pte_t) { (x) } )
#define __iopte(x) ((iopte_t) { (x) } )
/* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
#define __pgd(x) ((pgd_t) { (x) } )
#define __ctxd(x) ((ctxd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
@ -97,7 +96,6 @@ typedef unsigned long iopgprot_t;
#define __pte(x) (x)
#define __iopte(x) (x)
/* #define __pmd(x) (x) */ /* XXX later */
#define __pgd(x) (x)
#define __ctxd(x) (x)
#define __pgprot(x) (x)

4
arch/sparc/include/asm/pgalloc_32.h
View File

@ -29,9 +29,9 @@ static inline void free_pgd_fast(pgd_t *pgd)
static inline void pgd_set(pgd_t * pgdp, pmd_t * pmdp)
{
unsigned long pa = __nocache_pa((unsigned long)pmdp);
unsigned long pa = __nocache_pa(pmdp);
set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (pa >> 4)));
set_pte((pte_t *)pgdp, __pte((SRMMU_ET_PTD | (pa >> 4))));
}
#define pgd_populate(MM, PGD, PMD) pgd_set(PGD, PMD)

2
arch/sparc/include/asm/pgtable_32.h
View File

@ -298,7 +298,7 @@ static inline pte_t mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t prot)
{
prot &= ~__pgprot(SRMMU_CACHE);
pgprot_val(prot) &= ~pgprot_val(__pgprot(SRMMU_CACHE));
return prot;
}

10
arch/sparc/kernel/entry.S
View File

@ -1225,20 +1225,18 @@ breakpoint_trap:
RESTORE_ALL
#ifdef CONFIG_KGDB
.align 4
.globl kgdb_trap_low
.type kgdb_trap_low,#function
kgdb_trap_low:
ENTRY(kgdb_trap_low)
rd %wim,%l3
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
mov %l7, %o0 ! trap_level
call kgdb_trap
add %sp, STACKFRAME_SZ, %o0
add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs
RESTORE_ALL
.size kgdb_trap_low,.-kgdb_trap_low
ENDPROC(kgdb_trap_low)
#endif
.align 4

1
arch/sparc/kernel/kernel.h
View File

@ -127,6 +127,7 @@ extern unsigned int t_nmi[];
extern unsigned int linux_trap_ipi15_sun4d[];
extern unsigned int linux_trap_ipi15_sun4m[];
extern struct tt_entry trapbase;
extern struct tt_entry trapbase_cpu1;
extern struct tt_entry trapbase_cpu2;
extern struct tt_entry trapbase_cpu3;

11
arch/sparc/kernel/kgdb_32.c
View File

@ -12,7 +12,8 @@
#include <asm/irq.h>
#include <asm/cacheflush.h>
extern unsigned long trapbase;
#include "kernel.h"
#include "entry.h"
void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
{
@ -133,21 +134,19 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
return -1;
}
extern void do_hw_interrupt(struct pt_regs *regs, unsigned long type);
asmlinkage void kgdb_trap(struct pt_regs *regs)
asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs)
{
unsigned long flags;
if (user_mode(regs)) {
do_hw_interrupt(regs, 0xfd);
do_hw_interrupt(regs, trap_level);
return;
}
flushw_all();
local_irq_save(flags);
kgdb_handle_exception(0x172, SIGTRAP, 0, regs);
kgdb_handle_exception(trap_level, SIGTRAP, 0, regs);
local_irq_restore(flags);
}

4
arch/sparc/kernel/setup_32.c
View File

@ -68,8 +68,6 @@ struct screen_info screen_info = {
* prints out pretty messages and returns.
*/
extern unsigned long trapbase;
/* Pretty sick eh? */
static void prom_sync_me(void)
{
@ -300,7 +298,7 @@ void __init setup_arch(char **cmdline_p)
int i;
unsigned long highest_paddr;
sparc_ttable = (struct tt_entry *) &trapbase;
sparc_ttable = &trapbase;
/* Initialize PROM console and command line. */
*cmdline_p = prom_getbootargs();

4
arch/sparc/mm/io-unit.c
View File

@ -133,7 +133,7 @@ nexti: scan = find_next_zero_bit(iounit->bmap, limit, scan);
vaddr = IOUNIT_DMA_BASE + (scan << PAGE_SHIFT) + (vaddr & ~PAGE_MASK);
for (k = 0; k < npages; k++, iopte = __iopte(iopte_val(iopte) + 0x100), scan++) {
set_bit(scan, iounit->bmap);
sbus_writel(iopte, &iounit->page_table[scan]);
sbus_writel(iopte_val(iopte), &iounit->page_table[scan]);
}
IOD(("%08lx\n", vaddr));
return vaddr;
@ -228,7 +228,7 @@ static int iounit_map_dma_area(struct device *dev, dma_addr_t *pba, unsigned lon
i = ((addr - IOUNIT_DMA_BASE) >> PAGE_SHIFT);
iopte = iounit->page_table + i;
sbus_writel(MKIOPTE(__pa(page)), iopte);
sbus_writel(iopte_val(MKIOPTE(__pa(page))), iopte);
}
addr += PAGE_SIZE;
va += PAGE_SIZE;

19
arch/sparc/mm/srmmu.c
View File

@ -107,17 +107,22 @@ static inline int srmmu_pmd_none(pmd_t pmd)
/* XXX should we hyper_flush_whole_icache here - Anton */
static inline void srmmu_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
{ set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pgdp) >> 4))); }
{
pte_t pte;
pte = __pte((SRMMU_ET_PTD | (__nocache_pa(pgdp) >> 4)));
set_pte((pte_t *)ctxp, pte);
}
void pmd_set(pmd_t *pmdp, pte_t *ptep)
{
unsigned long ptp; /* Physical address, shifted right by 4 */
int i;
ptp = __nocache_pa((unsigned long) ptep) >> 4;
ptp = __nocache_pa(ptep) >> 4;
for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
set_pte((pte_t *)&pmdp->pmdv[i], __pte(SRMMU_ET_PTD | ptp));
ptp += (SRMMU_REAL_PTRS_PER_PTE * sizeof(pte_t) >> 4);
}
}
@ -128,8 +133,8 @@ void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
ptp = page_to_pfn(ptep) << (PAGE_SHIFT-4); /* watch for overflow */
for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
set_pte((pte_t *)&pmdp->pmdv[i], __pte(SRMMU_ET_PTD | ptp));
ptp += (SRMMU_REAL_PTRS_PER_PTE * sizeof(pte_t) >> 4);
}
}
@ -911,7 +916,7 @@ void __init srmmu_paging_init(void)
/* ctx table has to be physically aligned to its size */
srmmu_context_table = __srmmu_get_nocache(num_contexts * sizeof(ctxd_t), num_contexts * sizeof(ctxd_t));
srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa((unsigned long)srmmu_context_table);
srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa(srmmu_context_table);
for (i = 0; i < num_contexts; i++)
srmmu_ctxd_set((ctxd_t *)__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);