brcm47xx: 3.14: backport MIPS patches for early HIGHMEM support
authorHauke Mehrtens <hauke@hauke-m.de>
Thu, 7 Aug 2014 20:21:11 +0000 (20:21 +0000)
committerHauke Mehrtens <hauke@hauke-m.de>
Thu, 7 Aug 2014 20:21:11 +0000 (20:21 +0000)
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 42053

target/linux/brcm47xx/patches-3.14/149-MIPS-BCM47XX-Move-shared-symbols-to-the-config-BCM47.patch [new file with mode: 0644]
target/linux/brcm47xx/patches-3.14/150-MIPS-BCM47XX-Select-SYS_SUPPORTS_HIGHMEM-for-BCM47XX.patch [new file with mode: 0644]
target/linux/brcm47xx/patches-3.14/152-Revert-MIPS-Delete-unused-function-add_temporary_ent.patch [new file with mode: 0644]
target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch [new file with mode: 0644]
target/linux/brcm47xx/patches-3.14/830-huawei_e970_support.patch

diff --git a/target/linux/brcm47xx/patches-3.14/149-MIPS-BCM47XX-Move-shared-symbols-to-the-config-BCM47.patch b/target/linux/brcm47xx/patches-3.14/149-MIPS-BCM47XX-Move-shared-symbols-to-the-config-BCM47.patch
new file mode 100644 (file)
index 0000000..4babed9
--- /dev/null
@@ -0,0 +1,50 @@
+From c949c0bc55571209fe6742f645b1e2eb20099591 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Tue, 17 Jun 2014 16:36:50 +0200
+Subject: [PATCH 149/150] MIPS: BCM47XX: Move shared symbols to the config
+ BCM47XX
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+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/7100/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/Kconfig         | 2 ++
+ arch/mips/bcm47xx/Kconfig | 4 ----
+ 2 files changed, 2 insertions(+), 4 deletions(-)
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -124,6 +124,8 @@ config BCM47XX
+       select SYS_SUPPORTS_LITTLE_ENDIAN
+       select SYS_HAS_EARLY_PRINTK
+       select EARLY_PRINTK_8250 if EARLY_PRINTK
++      select GPIOLIB
++      select LEDS_GPIO_REGISTER
+       help
+        Support for BCM47XX based boards
+--- a/arch/mips/bcm47xx/Kconfig
++++ b/arch/mips/bcm47xx/Kconfig
+@@ -11,8 +11,6 @@ config BCM47XX_SSB
+       select SSB_DRIVER_PCICORE if PCI
+       select SSB_PCICORE_HOSTMODE if PCI
+       select SSB_DRIVER_GPIO
+-      select GPIOLIB
+-      select LEDS_GPIO_REGISTER
+       default y
+       help
+        Add support for old Broadcom BCM47xx boards with Sonics Silicon Backplane support.
+@@ -29,8 +27,6 @@ config BCM47XX_BCMA
+       select BCMA_HOST_PCI if PCI
+       select BCMA_DRIVER_PCI_HOSTMODE if PCI
+       select BCMA_DRIVER_GPIO
+-      select GPIOLIB
+-      select LEDS_GPIO_REGISTER
+       default y
+       help
+        Add support for new Broadcom BCM47xx boards with Broadcom specific Advanced Microcontroller Bus.
diff --git a/target/linux/brcm47xx/patches-3.14/150-MIPS-BCM47XX-Select-SYS_SUPPORTS_HIGHMEM-for-BCM47XX.patch b/target/linux/brcm47xx/patches-3.14/150-MIPS-BCM47XX-Select-SYS_SUPPORTS_HIGHMEM-for-BCM47XX.patch
new file mode 100644 (file)
index 0000000..2fa4442
--- /dev/null
@@ -0,0 +1,32 @@
+From ce01cbef8b0b71d01f8a68cba59da3198165bae6 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Tue, 17 Jun 2014 16:36:51 +0200
+Subject: [PATCH 150/150] MIPS: BCM47XX: Select SYS_SUPPORTS_HIGHMEM for
+ BCM47XX_BCMA
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It seems that bcm47xx can handle only 128 MiB of RAM directly. There
+are few devices with 256 MiB, but Broadcom's SDK uses highmem to handle
+anything above 128 MiB.
+
+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/7101/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/bcm47xx/Kconfig | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/mips/bcm47xx/Kconfig
++++ b/arch/mips/bcm47xx/Kconfig
+@@ -20,6 +20,7 @@ config BCM47XX_SSB
+ config BCM47XX_BCMA
+       bool "BCMA Support for Broadcom BCM47XX"
+       select SYS_HAS_CPU_MIPS32_R2
++      select SYS_SUPPORTS_HIGHMEM
+       select CPU_MIPSR2_IRQ_VI
+       select BCMA
+       select BCMA_HOST_SOC
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
new file mode 100644 (file)
index 0000000..7d81016
--- /dev/null
@@ -0,0 +1,107 @@
+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();
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
new file mode 100644 (file)
index 0000000..ad0dd7d
--- /dev/null
@@ -0,0 +1,166 @@
+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
+@@ -218,6 +218,9 @@ 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)
index 834e5e0..107cedc 100644 (file)
@@ -8,7 +8,7 @@
  #include <asm/bootinfo.h>
  #include <asm/idle.h>
  #include <asm/prom.h>
  #include <asm/bootinfo.h>
  #include <asm/idle.h>
  #include <asm/prom.h>
-@@ -266,6 +267,33 @@ static struct fixed_phy_status bcm47xx_f
+@@ -269,6 +270,33 @@ static struct fixed_phy_status bcm47xx_f
        .duplex = DUPLEX_FULL,
  };
  
        .duplex = DUPLEX_FULL,
  };
  
@@ -42,7 +42,7 @@
  static int __init bcm47xx_register_bus_complete(void)
  {
        switch (bcm47xx_bus_type) {
  static int __init bcm47xx_register_bus_complete(void)
  {
        switch (bcm47xx_bus_type) {
-@@ -285,6 +313,7 @@ static int __init bcm47xx_register_bus_c
+@@ -288,6 +316,7 @@ static int __init bcm47xx_register_bus_c
        bcm47xx_workarounds();
  
        fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
        bcm47xx_workarounds();
  
        fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);