MIPS: Remove TX39XX support

No (active) developer owns this hardware, so let's remove Linux support.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>

4 files changed, 2 insertions, 458 deletions

diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
index 4acc4f3d31f8..304692391519 100644
--- a/arch/mips/mm/Makefile
+++ b/arch/mips/mm/Makefile
@@ -36,7 +36,6 @@ obj-$(CONFIG_CPU_R3K_TLB)	+= tlb-r3k.o
 obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o
 obj-$(CONFIG_CPU_R3000)		+= c-r3k.o
 obj-$(CONFIG_CPU_SB1)		+= c-r4k.o cerr-sb1.o cex-sb1.o tlb-r4k.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
diff --git a/arch/mips/mm/c-tx39.c b/arch/mips/mm/c-tx39.c
deleted file mode 100644
index 03dfbb40ec73..000000000000
--- a/arch/mips/mm/c-tx39.c
+++ /dev/null
@@ -1,414 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * r2300.c: R2000 and R3000 specific mmu/cache code.
- *
- * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
- *
- * with a lot of changes to make this thing work for R3000s
- * Tx39XX R4k style caches added. HK
- * Copyright (C) 1998, 1999, 2000 Harald Koerfgen
- * Copyright (C) 1998 Gleb Raiko & Vladimir Roganov
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/mm.h>
-
-#include <asm/cacheops.h>
-#include <asm/page.h>
-#include <asm/mmu_context.h>
-#include <asm/isadep.h>
-#include <asm/io.h>
-#include <asm/bootinfo.h>
-#include <asm/cpu.h>
-
-/* For R3000 cores with R4000 style caches */
-static unsigned long icache_size, dcache_size;		/* Size in bytes */
-
-#include <asm/r4kcache.h>
-
-/* This sequence is required to ensure icache is disabled immediately */
-#define TX39_STOP_STREAMING() \
-__asm__ __volatile__( \
-	".set	 push\n\t" \
-	".set	 noreorder\n\t" \
-	"b	 1f\n\t" \
-	"nop\n\t" \
-	"1:\n\t" \
-	".set pop" \
-	)
-
-/* TX39H-style cache flush routines. */
-static void tx39h_flush_icache_all(void)
-{
-	unsigned long flags, config;
-
-	/* disable icache (set ICE#) */
-	local_irq_save(flags);
-	config = read_c0_conf();
-	write_c0_conf(config & ~TX39_CONF_ICE);
-	TX39_STOP_STREAMING();
-	blast_icache16();
-	write_c0_conf(config);
-	local_irq_restore(flags);
-}
-
-static void tx39h_dma_cache_wback_inv(unsigned long addr, unsigned long size)
-{
-	/* Catch bad driver code */
-	BUG_ON(size == 0);
-
-	iob();
-	blast_inv_dcache_range(addr, addr + size);
-}
-
-
-/* TX39H2,TX39H3 */
-static inline void tx39_blast_dcache_page(unsigned long addr)
-{
-	if (current_cpu_type() != CPU_TX3912)
-		blast_dcache16_page(addr);
-}
-
-static inline void tx39_blast_dcache_page_indexed(unsigned long addr)
-{
-	blast_dcache16_page_indexed(addr);
-}
-
-static inline void tx39_blast_dcache(void)
-{
-	blast_dcache16();
-}
-
-static inline void tx39_blast_icache_page(unsigned long addr)
-{
-	unsigned long flags, config;
-	/* disable icache (set ICE#) */
-	local_irq_save(flags);
-	config = read_c0_conf();
-	write_c0_conf(config & ~TX39_CONF_ICE);
-	TX39_STOP_STREAMING();
-	blast_icache16_page(addr);
-	write_c0_conf(config);
-	local_irq_restore(flags);
-}
-
-static inline void tx39_blast_icache_page_indexed(unsigned long addr)
-{
-	unsigned long flags, config;
-	/* disable icache (set ICE#) */
-	local_irq_save(flags);
-	config = read_c0_conf();
-	write_c0_conf(config & ~TX39_CONF_ICE);
-	TX39_STOP_STREAMING();
-	blast_icache16_page_indexed(addr);
-	write_c0_conf(config);
-	local_irq_restore(flags);
-}
-
-static inline void tx39_blast_icache(void)
-{
-	unsigned long flags, config;
-	/* disable icache (set ICE#) */
-	local_irq_save(flags);
-	config = read_c0_conf();
-	write_c0_conf(config & ~TX39_CONF_ICE);
-	TX39_STOP_STREAMING();
-	blast_icache16();
-	write_c0_conf(config);
-	local_irq_restore(flags);
-}
-
-static void tx39__flush_cache_vmap(void)
-{
-	tx39_blast_dcache();
-}
-
-static void tx39__flush_cache_vunmap(void)
-{
-	tx39_blast_dcache();
-}
-
-static inline void tx39_flush_cache_all(void)
-{
-	if (!cpu_has_dc_aliases)
-		return;
-
-	tx39_blast_dcache();
-}
-
-static inline void tx39___flush_cache_all(void)
-{
-	tx39_blast_dcache();
-	tx39_blast_icache();
-}
-
-static void tx39_flush_cache_mm(struct mm_struct *mm)
-{
-	if (!cpu_has_dc_aliases)
-		return;
-
-	if (cpu_context(smp_processor_id(), mm) != 0)
-		tx39_blast_dcache();
-}
-
-static void tx39_flush_cache_range(struct vm_area_struct *vma,
-	unsigned long start, unsigned long end)
-{
-	if (!cpu_has_dc_aliases)
-		return;
-	if (!(cpu_context(smp_processor_id(), vma->vm_mm)))
-		return;
-
-	tx39_blast_dcache();
-}
-
-static void tx39_flush_cache_page(struct vm_area_struct *vma, unsigned long page, unsigned long pfn)
-{
-	int exec = vma->vm_flags & VM_EXEC;
-	struct mm_struct *mm = vma->vm_mm;
-	pmd_t *pmdp;
-	pte_t *ptep;
-
-	/*
-	 * If ownes no valid ASID yet, cannot possibly have gotten
-	 * this page into the cache.
-	 */
-	if (cpu_context(smp_processor_id(), mm) == 0)
-		return;
-
-	page &= PAGE_MASK;
-	pmdp = pmd_off(mm, page);
-	ptep = pte_offset_kernel(pmdp, page);
-
-	/*
-	 * If the page isn't marked valid, the page cannot possibly be
-	 * in the cache.
-	 */
-	if (!(pte_val(*ptep) & _PAGE_PRESENT))
-		return;
-
-	/*
-	 * Doing flushes for another ASID than the current one is
-	 * too difficult since stupid R4k caches do a TLB translation
-	 * for every cache flush operation.  So we do indexed flushes
-	 * in that case, which doesn't overly flush the cache too much.
-	 */
-	if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID)) {
-		if (cpu_has_dc_aliases || exec)
-			tx39_blast_dcache_page(page);
-		if (exec)
-			tx39_blast_icache_page(page);
-
-		return;
-	}
-
-	/*
-	 * Do indexed flush, too much work to get the (possible) TLB refills
-	 * to work correctly.
-	 */
-	if (cpu_has_dc_aliases || exec)
-		tx39_blast_dcache_page_indexed(page);
-	if (exec)
-		tx39_blast_icache_page_indexed(page);
-}
-
-static void local_tx39_flush_data_cache_page(void * addr)
-{
-	tx39_blast_dcache_page((unsigned long)addr);
-}
-
-static void tx39_flush_data_cache_page(unsigned long addr)
-{
-	tx39_blast_dcache_page(addr);
-}
-
-static void tx39_flush_icache_range(unsigned long start, unsigned long end)
-{
-	if (end - start > dcache_size)
-		tx39_blast_dcache();
-	else
-		protected_blast_dcache_range(start, end);
-
-	if (end - start > icache_size)
-		tx39_blast_icache();
-	else {
-		unsigned long flags, config;
-		/* disable icache (set ICE#) */
-		local_irq_save(flags);
-		config = read_c0_conf();
-		write_c0_conf(config & ~TX39_CONF_ICE);
-		TX39_STOP_STREAMING();
-		protected_blast_icache_range(start, end);
-		write_c0_conf(config);
-		local_irq_restore(flags);
-	}
-}
-
-static void tx39_flush_kernel_vmap_range(unsigned long vaddr, int size)
-{
-	BUG();
-}
-
-static void tx39_dma_cache_wback_inv(unsigned long addr, unsigned long size)
-{
-	unsigned long end;
-
-	if (((size | addr) & (PAGE_SIZE - 1)) == 0) {
-		end = addr + size;
-		do {
-			tx39_blast_dcache_page(addr);
-			addr += PAGE_SIZE;
-		} while(addr != end);
-	} else if (size > dcache_size) {
-		tx39_blast_dcache();
-	} else {
-		blast_dcache_range(addr, addr + size);
-	}
-}
-
-static void tx39_dma_cache_inv(unsigned long addr, unsigned long size)
-{
-	unsigned long end;
-
-	if (((size | addr) & (PAGE_SIZE - 1)) == 0) {
-		end = addr + size;
-		do {
-			tx39_blast_dcache_page(addr);
-			addr += PAGE_SIZE;
-		} while(addr != end);
-	} else if (size > dcache_size) {
-		tx39_blast_dcache();
-	} else {
-		blast_inv_dcache_range(addr, addr + size);
-	}
-}
-
-static __init void tx39_probe_cache(void)
-{
-	unsigned long config;
-
-	config = read_c0_conf();
-
-	icache_size = 1 << (10 + ((config & TX39_CONF_ICS_MASK) >>
-				  TX39_CONF_ICS_SHIFT));
-	dcache_size = 1 << (10 + ((config & TX39_CONF_DCS_MASK) >>
-				  TX39_CONF_DCS_SHIFT));
-
-	current_cpu_data.icache.linesz = 16;
-	switch (current_cpu_type()) {
-	case CPU_TX3912:
-		current_cpu_data.icache.ways = 1;
-		current_cpu_data.dcache.ways = 1;
-		current_cpu_data.dcache.linesz = 4;
-		break;
-
-	case CPU_TX3927:
-		current_cpu_data.icache.ways = 2;
-		current_cpu_data.dcache.ways = 2;
-		current_cpu_data.dcache.linesz = 16;
-		break;
-
-	case CPU_TX3922:
-	default:
-		current_cpu_data.icache.ways = 1;
-		current_cpu_data.dcache.ways = 1;
-		current_cpu_data.dcache.linesz = 16;
-		break;
-	}
-}
-
-void tx39_cache_init(void)
-{
-	extern void build_clear_page(void);
-	extern void build_copy_page(void);
-	unsigned long config;
-
-	config = read_c0_conf();
-	config &= ~TX39_CONF_WBON;
-	write_c0_conf(config);
-
-	tx39_probe_cache();
-
-	switch (current_cpu_type()) {
-	case CPU_TX3912:
-		/* TX39/H core (writethru direct-map cache) */
-		__flush_cache_vmap	= tx39__flush_cache_vmap;
-		__flush_cache_vunmap	= tx39__flush_cache_vunmap;
-		flush_cache_all = tx39h_flush_icache_all;
-		__flush_cache_all	= tx39h_flush_icache_all;
-		flush_cache_mm		= (void *) tx39h_flush_icache_all;
-		flush_cache_range	= (void *) tx39h_flush_icache_all;
-		flush_cache_page	= (void *) tx39h_flush_icache_all;
-		flush_icache_range	= (void *) tx39h_flush_icache_all;
-		local_flush_icache_range = (void *) tx39h_flush_icache_all;
-
-		local_flush_data_cache_page	= (void *) tx39h_flush_icache_all;
-		flush_data_cache_page	= (void *) tx39h_flush_icache_all;
-
-		_dma_cache_wback_inv	= tx39h_dma_cache_wback_inv;
-
-		shm_align_mask		= PAGE_SIZE - 1;
-
-		break;
-
-	case CPU_TX3922:
-	case CPU_TX3927:
-	default:
-		/* TX39/H2,H3 core (writeback 2way-set-associative cache) */
-		/* board-dependent init code may set WBON */
-
-		__flush_cache_vmap	= tx39__flush_cache_vmap;
-		__flush_cache_vunmap	= tx39__flush_cache_vunmap;
-
-		flush_cache_all = tx39_flush_cache_all;
-		__flush_cache_all = tx39___flush_cache_all;
-		flush_cache_mm = tx39_flush_cache_mm;
-		flush_cache_range = tx39_flush_cache_range;
-		flush_cache_page = tx39_flush_cache_page;
-		flush_icache_range = tx39_flush_icache_range;
-		local_flush_icache_range = tx39_flush_icache_range;
-
-		__flush_kernel_vmap_range = tx39_flush_kernel_vmap_range;
-
-		local_flush_data_cache_page = local_tx39_flush_data_cache_page;
-		flush_data_cache_page = tx39_flush_data_cache_page;
-
-		_dma_cache_wback_inv = tx39_dma_cache_wback_inv;
-		_dma_cache_wback = tx39_dma_cache_wback_inv;
-		_dma_cache_inv = tx39_dma_cache_inv;
-
-		shm_align_mask = max_t(unsigned long,
-				       (dcache_size / current_cpu_data.dcache.ways) - 1,
-				       PAGE_SIZE - 1);
-
-		break;
-	}
-
-	__flush_icache_user_range = flush_icache_range;
-	__local_flush_icache_user_range = local_flush_icache_range;
-
-	current_cpu_data.icache.waysize = icache_size / current_cpu_data.icache.ways;
-	current_cpu_data.dcache.waysize = dcache_size / current_cpu_data.dcache.ways;
-
-	current_cpu_data.icache.sets =
-		current_cpu_data.icache.waysize / current_cpu_data.icache.linesz;
-	current_cpu_data.dcache.sets =
-		current_cpu_data.dcache.waysize / current_cpu_data.dcache.linesz;
-
-	if (current_cpu_data.dcache.waysize > PAGE_SIZE)
-		current_cpu_data.dcache.flags |= MIPS_CACHE_ALIASES;
-
-	current_cpu_data.icache.waybit = 0;
-	current_cpu_data.dcache.waybit = 0;
-
-	pr_info("Primary instruction cache %ldkB, linesize %d bytes\n",
-		icache_size >> 10, current_cpu_data.icache.linesz);
-	pr_info("Primary data cache %ldkB, linesize %d bytes\n",
-		dcache_size >> 10, current_cpu_data.dcache.linesz);
-
-	build_clear_page();
-	build_copy_page();
-	tx39h_flush_icache_all();
-}
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 830ab91e574f..7be7240f7703 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -195,11 +195,6 @@ void cpu_cache_init(void)
 
 		r4k_cache_init();
 	}
-	if (cpu_has_tx39_cache) {
-		extern void __weak tx39_cache_init(void);
-
-		tx39_cache_init();
-	}
 
 	if (cpu_has_octeon_cache) {
 		extern void __weak octeon_cache_init(void);
diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c
index a36622ebea55..53dfa2b9316b 100644
--- a/arch/mips/mm/tlb-r3k.c
+++ b/arch/mips/mm/tlb-r3k.c
@@ -36,8 +36,6 @@ extern void build_tlb_refill_handler(void);
 		"nop\n\t"		\
 		".set	pop\n\t")
 
-int r3k_have_wired_reg;			/* Should be in cpu_data? */
-
 /* TLB operations. */
 static void local_flush_tlb_from(int entry)
 {
@@ -62,7 +60,7 @@ void local_flush_tlb_all(void)
 	printk("[tlball]");
 #endif
 	local_irq_save(flags);
-	local_flush_tlb_from(r3k_have_wired_reg ? read_c0_wired() : 8);
+	local_flush_tlb_from(8);
 	local_irq_restore(flags);
 }
 
@@ -224,34 +222,7 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
 	unsigned long old_ctx;
 	static unsigned long wired = 0;
 
-	if (r3k_have_wired_reg) {			/* TX39XX */
-		unsigned long old_pagemask;
-		unsigned long w;
-
-#ifdef DEBUG_TLB
-		printk("[tlbwired<entry lo0 %8x, hi %8x\n, pagemask %8x>]\n",
-		       entrylo0, entryhi, pagemask);
-#endif
-
-		local_irq_save(flags);
-		/* Save old context and create impossible VPN2 value */
-		old_ctx = read_c0_entryhi() & asid_mask;
-		old_pagemask = read_c0_pagemask();
-		w = read_c0_wired();
-		write_c0_wired(w + 1);
-		write_c0_index(w << 8);
-		write_c0_pagemask(pagemask);
-		write_c0_entryhi(entryhi);
-		write_c0_entrylo0(entrylo0);
-		BARRIER;
-		tlb_write_indexed();
-
-		write_c0_entryhi(old_ctx);
-		write_c0_pagemask(old_pagemask);
-		local_flush_tlb_all();
-		local_irq_restore(flags);
-
-	} else if (wired < 8) {
+	if (wired < 8) {
 #ifdef DEBUG_TLB
 		printk("[tlbwired<entry lo0 %8x, hi %8x\n>]\n",
 		       entrylo0, entryhi);
@@ -272,13 +243,6 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
 
 void tlb_init(void)
 {
-	switch (current_cpu_type()) {
-	case CPU_TX3922:
-	case CPU_TX3927:
-		r3k_have_wired_reg = 1;
-		write_c0_wired(0);		/* Set to 8 on reset... */
-		break;
-	}
 	local_flush_tlb_from(0);
 	build_tlb_refill_handler();
 }