diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch b/target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch deleted file mode 100644 index ee69e358ff..0000000000 --- a/target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch +++ /dev/null @@ -1,166 +0,0 @@ -From 6ee1d93455384cef8a0426effe85da241b525b63 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 23:26:33 +0200 -Subject: [PATCH 153/153] MIPS: BCM47XX: Detect more then 128 MiB of RAM - (HIGHMEM) -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -So far BCM47XX can only detect amount of HIGHMEM. It still requires -adding (registering) and well-testing before enabling by default. - -Signed-off-by: Rafał Miłecki <zajec5@gmail.com> -Acked-by: Hauke Mehrtens <hauke@hauke-m.de> -Cc: linux-mips@linux-mips.org -Patchwork: https://patchwork.linux-mips.org/patch/7396/ -Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---- - arch/mips/bcm47xx/bcm47xx_private.h | 3 ++ - arch/mips/bcm47xx/prom.c | 68 ++++++++++++++++++++++++++++++++++++- - arch/mips/bcm47xx/setup.c | 3 ++ - arch/mips/include/asm/pgtable-32.h | 2 ++ - arch/mips/mm/tlb-r4k.c | 2 +- - 5 files changed, 76 insertions(+), 2 deletions(-) - ---- a/arch/mips/bcm47xx/bcm47xx_private.h -+++ b/arch/mips/bcm47xx/bcm47xx_private.h -@@ -3,6 +3,9 @@ - - #include <linux/kernel.h> - -+/* prom.c */ -+void __init bcm47xx_prom_highmem_init(void); -+ - /* buttons.c */ - int __init bcm47xx_buttons_register(void); - ---- a/arch/mips/bcm47xx/prom.c -+++ b/arch/mips/bcm47xx/prom.c -@@ -51,6 +51,8 @@ __init void bcm47xx_set_system_type(u16 - chip_id); - } - -+static unsigned long lowmem __initdata; -+ - static __init void prom_init_mem(void) - { - unsigned long mem; -@@ -84,6 +86,7 @@ static __init void prom_init_mem(void) - if (!memcmp(prom_init, prom_init + mem, 32)) - break; - } -+ lowmem = mem; - - /* Ignoring the last page when ddr size is 128M. Cached - * accesses to last page is causing the processor to prefetch -@@ -92,7 +95,6 @@ static __init void prom_init_mem(void) - */ - if (c->cputype == CPU_74K && (mem == (128 << 20))) - mem -= 0x1000; -- - add_memory_region(0, mem, BOOT_MEM_RAM); - } - -@@ -111,3 +113,67 @@ void __init prom_init(void) - void __init prom_free_prom_memory(void) - { - } -+ -+#if defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM) -+ -+#define EXTVBASE 0xc0000000 -+#define ENTRYLO(x) ((pte_val(pfn_pte((x) >> _PFN_SHIFT, PAGE_KERNEL_UNCACHED)) >> 6) | 1) -+ -+#include <asm/tlbflush.h> -+ -+/* Stripped version of tlb_init, with the call to build_tlb_refill_handler -+ * dropped. Calling it at this stage causes a hang. -+ */ -+void __cpuinit early_tlb_init(void) -+{ -+ write_c0_pagemask(PM_DEFAULT_MASK); -+ write_c0_wired(0); -+ temp_tlb_entry = current_cpu_data.tlbsize - 1; -+ local_flush_tlb_all(); -+} -+ -+void __init bcm47xx_prom_highmem_init(void) -+{ -+ unsigned long off = (unsigned long)prom_init; -+ unsigned long extmem = 0; -+ bool highmem_region = false; -+ -+ if (WARN_ON(bcm47xx_bus_type != BCM47XX_BUS_TYPE_BCMA)) -+ return; -+ -+ if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706) -+ highmem_region = true; -+ -+ if (lowmem != 128 << 20 || !highmem_region) -+ return; -+ -+ early_tlb_init(); -+ -+ /* Add one temporary TLB entry to map SDRAM Region 2. -+ * Physical Virtual -+ * 0x80000000 0xc0000000 (1st: 256MB) -+ * 0x90000000 0xd0000000 (2nd: 256MB) -+ */ -+ add_temporary_entry(ENTRYLO(0x80000000), -+ ENTRYLO(0x80000000 + (256 << 20)), -+ EXTVBASE, PM_256M); -+ -+ off = EXTVBASE + __pa(off); -+ for (extmem = 128 << 20; extmem < 512 << 20; extmem <<= 1) { -+ if (!memcmp(prom_init, (void *)(off + extmem), 16)) -+ break; -+ } -+ extmem -= lowmem; -+ -+ early_tlb_init(); -+ -+ if (!extmem) -+ return; -+ -+ pr_warn("Found %lu MiB of extra memory, but highmem is unsupported yet!\n", -+ extmem >> 20); -+ -+ /* TODO: Register extra memory */ -+} -+ -+#endif /* defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM) */ ---- a/arch/mips/bcm47xx/setup.c -+++ b/arch/mips/bcm47xx/setup.c -@@ -231,6 +231,9 @@ void __init plat_mem_setup(void) - bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA; - bcm47xx_register_bcma(); - bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id); -+#ifdef CONFIG_HIGHMEM -+ bcm47xx_prom_highmem_init(); -+#endif - #endif - } else { - printk(KERN_INFO "bcm47xx: using ssb bus\n"); ---- a/arch/mips/include/asm/pgtable-32.h -+++ b/arch/mips/include/asm/pgtable-32.h -@@ -18,6 +18,8 @@ - - #include <asm-generic/pgtable-nopmd.h> - -+extern int temp_tlb_entry __cpuinitdata; -+ - /* - * - add_temporary_entry() add a temporary TLB entry. We use TLB entries - * starting at the top and working down. This is for populating the ---- a/arch/mips/mm/tlb-r4k.c -+++ b/arch/mips/mm/tlb-r4k.c -@@ -417,7 +417,7 @@ int __init has_transparent_hugepage(void - * lifetime of the system - */ - --static int temp_tlb_entry __cpuinitdata; -+int temp_tlb_entry __cpuinitdata; - - __init int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1, - unsigned long entryhi, unsigned long pagemask) |