MIPS: Select R3k-style TLB in Kconfig

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

arch/mips/include/asm/pgtable-32.h

@@ -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 */

arch/mips/include/asm/pgtable-bits.h

@@ -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

arch/mips/include/asm/pgtable.h

@@ -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));