MIPS: Cavium: Add support for 8k and 32k page sizes.

Beyond the requirements of the architecture standard Cavium also supports
8k and 32k pages.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: David Daney <ddaney@caviumnetworks.com>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 998e5db..023aa2d 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1411,13 +1411,12 @@ config PAGE_SIZE_4KB
 
 config PAGE_SIZE_8KB
        bool "8kB"
-       depends on EXPERIMENTAL && CPU_R8000
+       depends on (EXPERIMENTAL && CPU_R8000) || CPU_CAVIUM_OCTEON
        help
          Using 8kB page size will result in higher performance kernel at
          the price of higher memory consumption.  This option is available
-         only on the R8000 processor.  Not that at the time of this writing
-         this option is still high experimental; there are also issues with
-         compatibility of user applications.
+         only on R8000 and cnMIPS processors.  Note that you will need a
+         suitable Linux distribution to support this.
 
 config PAGE_SIZE_16KB
        bool "16kB"
@@ -1428,6 +1427,15 @@ config PAGE_SIZE_16KB
          all non-R3000 family processors.  Note that you will need a suitable
          Linux distribution to support this.
 
+config PAGE_SIZE_32KB
+       bool "32kB"
+       depends on CPU_CAVIUM_OCTEON
+       help
+         Using 32kB page size will result in higher performance kernel at
+         the price of higher memory consumption.  This option is available
+         only on cnMIPS cores.  Note that you will need a suitable Linux
+         distribution to support this.
+
 config PAGE_SIZE_64KB
        bool "64kB"
        depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 1f79877..0ef30c8 100644 (file)
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -184,12 +184,19 @@
 #else
 
 #define PM_4K          0x00000000
+#define PM_8K          0x00002000
 #define PM_16K         0x00006000
+#define PM_32K         0x0000e000
 #define PM_64K         0x0001e000
+#define PM_128K                0x0003e000
 #define PM_256K                0x0007e000
+#define PM_512K                0x000fe000
 #define PM_1M          0x001fe000
+#define PM_2M          0x003fe000
 #define PM_4M          0x007fe000
+#define PM_8M          0x00ffe000
 #define PM_16M         0x01ffe000
+#define PM_32M         0x03ffe000
 #define PM_64M         0x07ffe000
 #define PM_256M                0x1fffe000
 #define PM_1G          0x7fffe000
@@ -201,8 +208,12 @@
  */
 #ifdef CONFIG_PAGE_SIZE_4KB
 #define PM_DEFAULT_MASK        PM_4K
+#elif defined(CONFIG_PAGE_SIZE_8KB)
+#define PM_DEFAULT_MASK        PM_8K
 #elif defined(CONFIG_PAGE_SIZE_16KB)
 #define PM_DEFAULT_MASK        PM_16K
+#elif defined(CONFIG_PAGE_SIZE_32KB)
+#define PM_DEFAULT_MASK        PM_32K
 #elif defined(CONFIG_PAGE_SIZE_64KB)
 #define PM_DEFAULT_MASK        PM_64K
 #else

diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
index fe7a88e..9f946e4 100644 (file)
--- a/arch/mips/include/asm/page.h
+++ b/arch/mips/include/asm/page.h
@@ -23,6 +23,9 @@
 #ifdef CONFIG_PAGE_SIZE_16KB
 #define PAGE_SHIFT     14
 #endif
+#ifdef CONFIG_PAGE_SIZE_32KB
+#define PAGE_SHIFT     15
+#endif
 #ifdef CONFIG_PAGE_SIZE_64KB
 #define PAGE_SHIFT     16
 #endif

diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 943515f..4ed9d1b 100644 (file)
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -83,6 +83,12 @@
 #define PMD_ORDER              0
 #define PTE_ORDER              0
 #endif
+#ifdef CONFIG_PAGE_SIZE_32KB
+#define PGD_ORDER              0
+#define PUD_ORDER              aieeee_attempt_to_allocate_pud
+#define PMD_ORDER              0
+#define PTE_ORDER              0
+#endif
 #ifdef CONFIG_PAGE_SIZE_64KB
 #define PGD_ORDER              0
 #define PUD_ORDER              aieeee_attempt_to_allocate_pud

diff --git a/arch/mips/include/asm/thread_info.h b/arch/mips/include/asm/thread_info.h
index 676aa2a..143a481 100644 (file)
--- a/arch/mips/include/asm/thread_info.h
+++ b/arch/mips/include/asm/thread_info.h
@@ -75,6 +75,9 @@ register struct thread_info *__current_thread_info __asm__("$28");
 #ifdef CONFIG_PAGE_SIZE_16KB
 #define THREAD_SIZE_ORDER (0)
 #endif
+#ifdef CONFIG_PAGE_SIZE_32KB
+#define THREAD_SIZE_ORDER (0)
+#endif
 #ifdef CONFIG_PAGE_SIZE_64KB
 #define THREAD_SIZE_ORDER (0)
 #endif

diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c
index 779821c..3f69725 100644 (file)
--- a/arch/mips/lib/dump_tlb.c
+++ b/arch/mips/lib/dump_tlb.c
@@ -19,6 +19,15 @@ static inline const char *msk2str(unsigned int mask)
        case PM_16K:    return "16kb";
        case PM_64K:    return "64kb";
        case PM_256K:   return "256kb";
+#ifdef CONFIG_CPU_CAVIUM_OCTEON
+       case PM_8K:     return "8kb";
+       case PM_32K:    return "32kb";
+       case PM_128K:   return "128kb";
+       case PM_512K:   return "512kb";
+       case PM_2M:     return "2Mb";
+       case PM_8M:     return "8Mb";
+       case PM_32M:    return "32Mb";
+#endif
 #ifndef CONFIG_CPU_VR41XX
        case PM_1M:     return "1Mb";
        case PM_4M:     return "4Mb";