diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.14/152-Revert-MIPS-Delete-unused-function-add_temporary_ent.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.14/152-Revert-MIPS-Delete-unused-function-add_temporary_ent.patch | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/target/linux/brcm47xx/patches-3.14/152-Revert-MIPS-Delete-unused-function-add_temporary_ent.patch b/target/linux/brcm47xx/patches-3.14/152-Revert-MIPS-Delete-unused-function-add_temporary_ent.patch deleted file mode 100644 index 7d81016..0000000 --- a/target/linux/brcm47xx/patches-3.14/152-Revert-MIPS-Delete-unused-function-add_temporary_ent.patch +++ /dev/null @@ -1,107 +0,0 @@ -From d377732c8c9aac14ccb900b65678558b0fb8f0f3 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> -Date: Thu, 17 Jul 2014 23:26:32 +0200 -Subject: [PATCH 152/153] Revert "MIPS: Delete unused function - add_temporary_entry." -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -This reverts commit d7a887a73dec6c387b02a966a71aac767bbd9ce6. - -Function add_temporary_entry is needed by bcm47xx to support highmem. We -need to add a temporary entry to check for amount of RAM. -The only change made in this revert was replacing (ENTER|EXIT)_CRITICAL. - -Signed-off-by: Rafał Miłecki <zajec5@gmail.com> -Cc: linux-mips@linux-mips.org -Cc: Hauke Mehrtens <hauke@hauke-m.de> -Patchwork: https://patchwork.linux-mips.org/patch/7395/ -Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---- - arch/mips/include/asm/pgtable-32.h | 10 ++++++++ - arch/mips/mm/tlb-r4k.c | 47 ++++++++++++++++++++++++++++++++++++++ - 2 files changed, 57 insertions(+) - ---- a/arch/mips/include/asm/pgtable-32.h -+++ b/arch/mips/include/asm/pgtable-32.h -@@ -19,6 +19,16 @@ - #include <asm-generic/pgtable-nopmd.h> - - /* -+ * - add_temporary_entry() add a temporary TLB entry. We use TLB entries -+ * starting at the top and working down. This is for populating the -+ * TLB before trap_init() puts the TLB miss handler in place. It -+ * should be used only for entries matching the actual page tables, -+ * to prevent inconsistencies. -+ */ -+extern int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1, -+ unsigned long entryhi, unsigned long pagemask); -+ -+/* - * Basically we have the same two-level (which is the logical three level - * Linux page table layout folded) page tables as the i386. Some day - * when we have proper page coloring support we can have a 1% quicker ---- a/arch/mips/mm/tlb-r4k.c -+++ b/arch/mips/mm/tlb-r4k.c -@@ -411,6 +411,51 @@ int __init has_transparent_hugepage(void - - #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ - -+/* -+ * Used for loading TLB entries before trap_init() has started, when we -+ * don't actually want to add a wired entry which remains throughout the -+ * lifetime of the system -+ */ -+ -+static int temp_tlb_entry __cpuinitdata; -+ -+__init int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1, -+ unsigned long entryhi, unsigned long pagemask) -+{ -+ int ret = 0; -+ unsigned long flags; -+ unsigned long wired; -+ unsigned long old_pagemask; -+ unsigned long old_ctx; -+ -+ local_irq_save(flags); -+ /* Save old context and create impossible VPN2 value */ -+ old_ctx = read_c0_entryhi(); -+ old_pagemask = read_c0_pagemask(); -+ wired = read_c0_wired(); -+ if (--temp_tlb_entry < wired) { -+ printk(KERN_WARNING -+ "No TLB space left for add_temporary_entry\n"); -+ ret = -ENOSPC; -+ goto out; -+ } -+ -+ write_c0_index(temp_tlb_entry); -+ write_c0_pagemask(pagemask); -+ write_c0_entryhi(entryhi); -+ write_c0_entrylo0(entrylo0); -+ write_c0_entrylo1(entrylo1); -+ mtc0_tlbw_hazard(); -+ tlb_write_indexed(); -+ tlbw_use_hazard(); -+ -+ write_c0_entryhi(old_ctx); -+ write_c0_pagemask(old_pagemask); -+out: -+ local_irq_restore(flags); -+ return ret; -+} -+ - static int ntlb; - static int __init set_ntlb(char *str) - { -@@ -448,6 +493,8 @@ void tlb_init(void) - write_c0_pagegrain(pg); - } - -+ temp_tlb_entry = current_cpu_data.tlbsize - 1; -+ - /* From this point on the ARC firmware is dead. */ - local_flush_tlb_all(); - |