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MIPS: Select R3k-style TLB in Kconfig

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Currently areas where we need to determine whether the TLB is R3k-style
need to check for either of CONFIG_CPU_R3000 || CONFIG_CPU_TX39XX.

Introduce a new CONFIG_CPU_R3K_TLB & select it from both of the above,
allowing us to simplify checks for R3k-style TLBs by only checking for
this new Kconfig option.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: linux-mips@vger.kernel.org
This commit is contained in:
Paul Burton 2019-08-31 15:40:43 +00:00
parent 813cafc410
commit 5474682934
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
5 changed files with 16 additions and 10 deletions
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7
arch/mips/Kconfig
View File

@ -1575,6 +1575,7 @@ config CPU_R3000
depends on SYS_HAS_CPU_R3000
select CPU_HAS_WB
select CPU_HAS_LOAD_STORE_LR
select CPU_R3K_TLB
select CPU_SUPPORTS_32BIT_KERNEL
select CPU_SUPPORTS_HIGHMEM
help
@ -1590,6 +1591,7 @@ config CPU_TX39XX
depends on SYS_HAS_CPU_TX39XX
select CPU_SUPPORTS_32BIT_KERNEL
select CPU_HAS_LOAD_STORE_LR
select CPU_R3K_TLB
config CPU_VR41XX
bool "R41xx"
@ -2280,6 +2282,9 @@ config CPU_R2300_FPU
depends on MIPS_FP_SUPPORT
default y if CPU_R3000 || CPU_TX39XX
config CPU_R3K_TLB
bool
config CPU_R4K_FPU
bool
depends on MIPS_FP_SUPPORT
@ -2287,7 +2292,7 @@ config CPU_R4K_FPU
config CPU_R4K_CACHE_TLB
bool
default y if !(CPU_R3000 || CPU_SB1 || CPU_TX39XX || CPU_CAVIUM_OCTEON)
default y if !(CPU_R3K_TLB || CPU_SB1 || CPU_CAVIUM_OCTEON)
config MIPS_MT_SMP
bool "MIPS MT SMP support (1 TC on each available VPE)"

4
arch/mips/include/asm/pgtable-32.h
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@ -221,7 +221,7 @@ static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
#define pte_unmap(pte) ((void)(pte))
#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
#if defined(CONFIG_CPU_R3K_TLB)
/* Swap entries must have VALID bit cleared. */
#define __swp_type(x) (((x).val >> 10) & 0x1f)
@ -266,6 +266,6 @@ static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
#endif /* defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) */
#endif /* defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) */
#endif /* defined(CONFIG_CPU_R3K_TLB) */
#endif /* _ASM_PGTABLE_32_H */

6
arch/mips/include/asm/pgtable-bits.h
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@ -82,7 +82,7 @@ enum pgtable_bits {
_PAGE_SPECIAL_SHIFT,
};
#elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
#elif defined(CONFIG_CPU_R3K_TLB)
/* Page table bits used for r3k systems */
enum pgtable_bits {
@ -151,7 +151,7 @@ enum pgtable_bits {
#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
#if defined(CONFIG_CPU_R3K_TLB)
# define _CACHE_UNCACHED (1 << _CACHE_UNCACHED_SHIFT)
# define _CACHE_MASK _CACHE_UNCACHED
# define _PFN_SHIFT PAGE_SHIFT
@ -209,7 +209,7 @@ static inline uint64_t pte_to_entrylo(unsigned long pte_val)
/*
* Cache attributes
*/
#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
#if defined(CONFIG_CPU_R3K_TLB)
#define _CACHE_CACHABLE_NONCOHERENT 0
#define _CACHE_UNCACHED_ACCELERATED _CACHE_UNCACHED

4
arch/mips/include/asm/pgtable.h
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@ -199,7 +199,7 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
static inline void set_pte(pte_t *ptep, pte_t pteval)
{
*ptep = pteval;
#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
#if !defined(CONFIG_CPU_R3K_TLB)
if (pte_val(pteval) & _PAGE_GLOBAL) {
pte_t *buddy = ptep_buddy(ptep);
/*
@ -218,7 +218,7 @@ static inline void set_pte(pte_t *ptep, pte_t pteval)
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
htw_stop();
#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
#if !defined(CONFIG_CPU_R3K_TLB)
/* Preserve global status for the pair */
if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));

5
arch/mips/mm/Makefile
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@ -28,10 +28,11 @@ obj-$(CONFIG_HIGHMEM) += highmem.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_DMA_NONCOHERENT) += dma-noncoherent.o
obj-$(CONFIG_CPU_R3K_TLB) += tlb-r3k.o
obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o
obj-$(CONFIG_CPU_R3000) += c-r3k.o tlb-r3k.o
obj-$(CONFIG_CPU_R3000) += c-r3k.o
obj-$(CONFIG_CPU_SB1) += c-r4k.o cerr-sb1.o cex-sb1.o tlb-r4k.o
obj-$(CONFIG_CPU_TX39XX) += c-tx39.o tlb-r3k.o
obj-$(CONFIG_CPU_TX39XX) += c-tx39.o
obj-$(CONFIG_CPU_CAVIUM_OCTEON) += c-octeon.o cex-oct.o tlb-r4k.o
obj-$(CONFIG_IP22_CPU_SCACHE) += sc-ip22.o