Skip to content

L
linux
Commit 66fc6a62 authored by Linus Torvalds's avatar Linus Torvalds
Browse files
Options

Merge tag 'microblaze-v5.11' of git://git.monstr.eu/linux-2.6-microblaze 

Pull microblaze updates from Michal Simek:
 "The biggest change is to remove support for noMMU configuration.

  FPGAs are bigger so people use Microblaze with MMU for a lot of years
  and there is likely no user of this code anymore. No one is updating
  libraries for this configuration either.

   - Remove noMMU support

   - Add support for TIF_NOTIFY_SIGNAL

   - Small header fix"

* tag 'microblaze-v5.11' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Remove noMMU code
  microblaze: add support for TIF_NOTIFY_SIGNAL
  microblaze: Replace <linux/clk-provider.h> by <linux/of_clk.h>
parents 7acfd427 05cdf457
Expand all Hide whitespace changes
Inline Side-by-side
Showing with 16 additions and 1255 deletions
arch/microblaze/Kconfig
View file @ 66fc6a62
......@@ -3,19 +3,17 @@ config MICROBLAZE
def_bool y
select ARCH_32BIT_OFF_T
select ARCH_NO_SWAP
select ARCH_HAS_BINFMT_FLAT if !MMU
select ARCH_HAS_DMA_PREP_COHERENT
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_HAS_DMA_SET_UNCACHED if !MMU
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_WANT_IPC_PARSE_VERSION
select BUILDTIME_TABLE_SORT
select TIMER_OF
select CLONE_BACKWARDS3
select COMMON_CLK
select DMA_DIRECT_REMAP if MMU
select DMA_DIRECT_REMAP
select GENERIC_ATOMIC64
select GENERIC_CPU_DEVICES
select GENERIC_IDLE_POLL_SETUP
......@@ -44,7 +42,7 @@ config MICROBLAZE
select TRACING_SUPPORT
select VIRT_TO_BUS
select CPU_NO_EFFICIENT_FFS
select MMU_GATHER_NO_RANGE if MMU
select MMU_GATHER_NO_RANGE
select SPARSE_IRQ
select SET_FS
......@@ -95,8 +93,7 @@ menu "Processor type and features"
source "kernel/Kconfig.hz"
config MMU
bool "MMU support"
default n
def_bool y
comment "Boot options"
......@@ -142,18 +139,8 @@ config ADVANCED_OPTIONS
comment "Default settings for advanced configuration options are used"
depends on !ADVANCED_OPTIONS
config XILINX_UNCACHED_SHADOW
bool "Are you using uncached shadow for RAM ?"
depends on ADVANCED_OPTIONS && !MMU
default n
help
This is needed to be able to allocate uncachable memory regions.
The feature requires the design to define the RAM memory controller
window to be twice as large as the actual physical memory.
config HIGHMEM
bool "High memory support"
depends on MMU
select KMAP_LOCAL
help
The address space of Microblaze processors is only 4 Gigabytes large
......@@ -167,7 +154,7 @@ config HIGHMEM
config LOWMEM_SIZE_BOOL
bool "Set maximum low memory"
depends on ADVANCED_OPTIONS && MMU
depends on ADVANCED_OPTIONS
help
This option allows you to set the maximum amount of memory which
will be used as "low memory", that is, memory which the kernel can
......@@ -205,12 +192,11 @@ config KERNEL_START_BOOL
config KERNEL_START
hex "Virtual address of kernel base" if KERNEL_START_BOOL
default "0xc0000000" if MMU
default KERNEL_BASE_ADDR if !MMU
default "0xc0000000"
config TASK_SIZE_BOOL
bool "Set custom user task size"
depends on ADVANCED_OPTIONS && MMU
depends on ADVANCED_OPTIONS
help
This option allows you to set the amount of virtual address space
allocated to user tasks. This can be useful in optimizing the
......@@ -222,33 +208,6 @@ config TASK_SIZE
hex "Size of user task space" if TASK_SIZE_BOOL
default "0x80000000"
choice
prompt "Page size"
default MICROBLAZE_4K_PAGES
depends on ADVANCED_OPTIONS && !MMU
help
Select the kernel logical page size. Increasing the page size
will reduce software overhead at each page boundary, allow
hardware prefetch mechanisms to be more effective, and allow
larger dma transfers increasing IO efficiency and reducing
overhead. However the utilization of memory will increase.
For example, each cached file will using a multiple of the
page size to hold its contents and the difference between the
end of file and the end of page is wasted.
If unsure, choose 4K_PAGES.
config MICROBLAZE_4K_PAGES
bool "4k page size"
config MICROBLAZE_16K_PAGES
bool "16k page size"
config MICROBLAZE_64K_PAGES
bool "64k page size"
endchoice
endmenu
menu "Bus Options"
......
arch/microblaze/Makefile
View file @ 66fc6a62
# SPDX-License-Identifier: GPL-2.0
KBUILD_DEFCONFIG := mmu_defconfig
ifeq ($(CONFIG_MMU),y)
UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
else
UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"
endif
# What CPU vesion are we building for, and crack it open
# as major.minor.rev
......@@ -67,12 +63,7 @@ DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS)))
core-y += $(boot)/dts/
# defines filename extension depending memory management type
ifeq ($(CONFIG_MMU),)
MMU := -nommu
endif
export MMU DTB
export DTB
all: linux.bin
......
arch/microblaze/configs/mmu_defconfig
View file @ 66fc6a62
......@@ -16,7 +16,6 @@ CONFIG_XILINX_MICROBLAZE0_USE_DIV=1
CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL=2
CONFIG_XILINX_MICROBLAZE0_USE_FPU=2
CONFIG_HZ_100=y
CONFIG_MMU=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE_FORCE=y
CONFIG_HIGHMEM=y
......
arch/microblaze/configs/nommu_defconfig deleted 100644 → 0
View file @ 7acfd427
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_AUDIT=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_BASE_FULL is not set
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR=1
CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR=1
CONFIG_XILINX_MICROBLAZE0_USE_BARREL=1
CONFIG_XILINX_MICROBLAZE0_USE_DIV=1
CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL=2
CONFIG_XILINX_MICROBLAZE0_USE_FPU=2
CONFIG_HZ_100=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE_FORCE=y
CONFIG_PCI_XILINX=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_BLK_DEV_BSG is not set
CONFIG_PARTITION_ADVANCED=y
# CONFIG_EFI_PARTITION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
CONFIG_PCI=y
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_CFI=y
CONFIG_MTD_CFI_INTELEXT=y
CONFIG_MTD_CFI_AMDSTD=y
CONFIG_MTD_RAM=y
CONFIG_MTD_UCLINUX=y
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=8192
CONFIG_NETDEVICES=y
CONFIG_XILINX_EMACLITE=y
CONFIG_XILINX_LL_TEMAC=y
# CONFIG_INPUT is not set
# CONFIG_SERIO is not set
# CONFIG_VT is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_OF_PLATFORM=y
CONFIG_SERIAL_UARTLITE=y
CONFIG_SERIAL_UARTLITE_CONSOLE=y
# CONFIG_HW_RANDOM is not set
CONFIG_XILINX_HWICAP=y
CONFIG_I2C=y
CONFIG_I2C_XILINX=y
CONFIG_SPI=y
CONFIG_SPI_XILINX=y
CONFIG_GPIOLIB=y
CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_XILINX=y
CONFIG_POWER_RESET=y
CONFIG_POWER_RESET_GPIO_RESTART=y
# CONFIG_HWMON is not set
CONFIG_WATCHDOG=y
CONFIG_XILINX_WATCHDOG=y
CONFIG_FB=y
CONFIG_FB_XILINX=y
# CONFIG_USB_SUPPORT is not set
CONFIG_EXT3_FS=y
# CONFIG_DNOTIFY is not set
CONFIG_CRAMFS=y
CONFIG_ROMFS_FS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3_ACL=y
CONFIG_NLS=y
CONFIG_KEYS=y
CONFIG_ENCRYPTED_KEYS=y
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_MD4=y
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_ARC4=y
CONFIG_CRYPTO_DES=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_SLAB=y
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEBUG_SPINLOCK=y
arch/microblaze/include/asm/dma.h
View file @ 66fc6a62
......@@ -6,14 +6,8 @@
#ifndef _ASM_MICROBLAZE_DMA_H
#define _ASM_MICROBLAZE_DMA_H
#ifndef CONFIG_MMU
/* we don't have dma address limit. define it as zero to be
* unlimited. */
#define MAX_DMA_ADDRESS (0)
#else
/* Virtual address corresponding to last available physical memory address. */
#define MAX_DMA_ADDRESS (CONFIG_KERNEL_START + memory_size - 1)
#endif
#ifdef CONFIG_PCI
extern int isa_dma_bridge_buggy;
......
arch/microblaze/include/asm/exceptions.h
View file @ 66fc6a62
......@@ -11,11 +11,6 @@
#define _ASM_MICROBLAZE_EXCEPTIONS_H
#ifdef __KERNEL__
#ifndef CONFIG_MMU
#define EX_HANDLER_STACK_SIZ (4*19)
#endif
#ifndef __ASSEMBLY__
/* Macros to enable and disable HW exceptions in the MSR */
......
arch/microblaze/include/asm/io.h
View file @ 66fc6a62
......@@ -30,15 +30,12 @@ extern resource_size_t isa_mem_base;
#define PCI_IOBASE ((void __iomem *)_IO_BASE)
#define IO_SPACE_LIMIT (0xFFFFFFFF)
#ifdef CONFIG_MMU
#define page_to_bus(page) (page_to_phys(page))
extern void iounmap(volatile void __iomem *addr);
extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
#endif /* CONFIG_MMU */
/* Big Endian */
#define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
#define out_be16(a, v) __raw_writew((v), (a))
......
arch/microblaze/include/asm/mmu.h
View file @ 66fc6a62
......@@ -8,9 +8,6 @@
#ifndef _ASM_MICROBLAZE_MMU_H
#define _ASM_MICROBLAZE_MMU_H
# ifndef CONFIG_MMU
# include <asm-generic/mmu.h>
# else /* CONFIG_MMU */
# ifdef __KERNEL__
# ifndef __ASSEMBLY__
......@@ -119,5 +116,4 @@ extern u32 tlb_skip;
# define TLB_G 0x00000001 /* Memory is guarded from prefetch */
# endif /* __KERNEL__ */
# endif /* CONFIG_MMU */
#endif /* _ASM_MICROBLAZE_MMU_H */
arch/microblaze/include/asm/mmu_context.h
View file @ 66fc6a62
/* SPDX-License-Identifier: GPL-2.0 */
#ifdef CONFIG_MMU
# include <asm/mmu_context_mm.h>
#else
# include <asm-generic/nommu_context.h>
#endif
arch/microblaze/include/asm/page.h
View file @ 66fc6a62
......@@ -20,13 +20,7 @@
#ifdef __KERNEL__
/* PAGE_SHIFT determines the page size */
#if defined(CONFIG_MICROBLAZE_64K_PAGES)
#define PAGE_SHIFT 16
#elif defined(CONFIG_MICROBLAZE_16K_PAGES)
#define PAGE_SHIFT 14
#else
#define PAGE_SHIFT 12
#endif
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
......@@ -44,17 +38,6 @@
#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
#ifndef CONFIG_MMU
/*
* PAGE_OFFSET -- the first address of the first page of memory. When not
* using MMU this corresponds to the first free page in physical memory (aligned
* on a page boundary).
*/
extern unsigned int __page_offset;
#define PAGE_OFFSET __page_offset
#else /* CONFIG_MMU */
/*
* PAGE_OFFSET -- the first address of the first page of memory. With MMU
* it is set to the kernel start address (aligned on a page boundary).
......@@ -70,8 +53,6 @@ extern unsigned int __page_offset;
typedef unsigned long pte_basic_t;
#define PTE_FMT "%.8lx"
#endif /* CONFIG_MMU */
# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
......@@ -86,25 +67,12 @@ typedef struct page *pgtable_t;
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgprot; } pgprot_t;
/* FIXME this can depend on linux kernel version */
# ifdef CONFIG_MMU
typedef struct { unsigned long pgd; } pgd_t;
# else /* CONFIG_MMU */
typedef struct { unsigned long ste[64]; } pmd_t;
typedef struct { pmd_t pue[1]; } pud_t;
typedef struct { pud_t p4e[1]; } p4d_t;
typedef struct { p4d_t pge[1]; } pgd_t;
# endif /* CONFIG_MMU */
# define pte_val(x) ((x).pte)
# define pgprot_val(x) ((x).pgprot)
# ifdef CONFIG_MMU
# define pgd_val(x) ((x).pgd)
# else /* CONFIG_MMU */
# define pmd_val(x) ((x).ste[0])
# define pud_val(x) ((x).pue[0])
# define pgd_val(x) ((x).pge[0])
# endif /* CONFIG_MMU */
# define __pte(x) ((pte_t) { (x) })
# define __pgd(x) ((pgd_t) { (x) })
......@@ -142,28 +110,12 @@ extern int page_is_ram(unsigned long pfn);
# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
# ifdef CONFIG_MMU
# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
# else /* CONFIG_MMU */
# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
# define page_to_bus(page) (page_to_phys(page))
# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
# endif /* CONFIG_MMU */
# ifndef CONFIG_MMU
# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \
((pfn) <= (min_low_pfn + max_mapnr)))
# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
# else /* CONFIG_MMU */
# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
# endif /* CONFIG_MMU */
# endif /* __ASSEMBLY__ */
......@@ -174,12 +126,6 @@ extern int page_is_ram(unsigned long pfn);
/* Convert between virtual and physical address for MMU. */
/* Handle MicroBlaze processor with virtual memory. */
#ifndef CONFIG_MMU
#define __virt_to_phys(addr) addr
#define __phys_to_virt(addr) addr
#define tophys(rd, rs) addik rd, rs, 0
#define tovirt(rd, rs) addik rd, rs, 0
#else
#define __virt_to_phys(addr) \
((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
#define __phys_to_virt(addr) \
......@@ -188,14 +134,9 @@ extern int page_is_ram(unsigned long pfn);
addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
#define tovirt(rd, rs) \
addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
#endif /* CONFIG_MMU */
#define TOPHYS(addr) __virt_to_phys(addr)
#ifdef CONFIG_MMU
#endif /* CONFIG_MMU */
#endif /* __KERNEL__ */
#include <asm-generic/memory_model.h>
......
arch/microblaze/include/asm/pgalloc.h
View file @ 66fc6a62
......@@ -8,8 +8,6 @@
#ifndef _ASM_MICROBLAZE_PGALLOC_H
#define _ASM_MICROBLAZE_PGALLOC_H
#ifdef CONFIG_MMU
#include <linux/kernel.h> /* For min/max macros */
#include <linux/highmem.h>
#include <linux/pgtable.h>
......@@ -42,6 +40,4 @@ extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
#define pmd_populate_kernel(mm, pmd, pte) \
(pmd_val(*(pmd)) = (unsigned long) (pte))
#endif /* CONFIG_MMU */
#endif /* _ASM_MICROBLAZE_PGALLOC_H */
arch/microblaze/include/asm/pgtable.h
View file @ 66fc6a62
......@@ -14,47 +14,6 @@
extern int mem_init_done;
#endif
#ifndef CONFIG_MMU
#define pgd_present(pgd) (1) /* pages are always present on non MMU */
#define pgd_none(pgd) (0)
#define pgd_bad(pgd) (0)
#define pgd_clear(pgdp)
#define kern_addr_valid(addr) (1)
#define PAGE_NONE __pgprot(0) /* these mean nothing to non MMU */
#define PAGE_SHARED __pgprot(0) /* these mean nothing to non MMU */
#define PAGE_COPY __pgprot(0) /* these mean nothing to non MMU */
#define PAGE_READONLY __pgprot(0) /* these mean nothing to non MMU */
#define PAGE_KERNEL __pgprot(0) /* these mean nothing to non MMU */
#define pgprot_noncached(x) (x)
#define pgprot_writecombine pgprot_noncached
#define pgprot_device pgprot_noncached
#define __swp_type(x) (0)
#define __swp_offset(x) (0)
#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define ZERO_PAGE(vaddr) ({ BUG(); NULL; })
#define swapper_pg_dir ((pgd_t *) NULL)
#define arch_enter_lazy_cpu_mode() do {} while (0)
#define pgprot_noncached_wc(prot) prot
/*
* All 32bit addresses are effectively valid for vmalloc...
* Sort of meaningless for non-VM targets.
*/
#define VMALLOC_START 0
#define VMALLOC_END 0xffffffff
#else /* CONFIG_MMU */
#include <asm-generic/pgtable-nopmd.h>
#ifdef __KERNEL__
......@@ -491,8 +450,6 @@ void __init *early_get_page(void);
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* CONFIG_MMU */
#ifndef __ASSEMBLY__
extern unsigned long ioremap_bot, ioremap_base;
......
arch/microblaze/include/asm/processor.h
View file @ 66fc6a62
......@@ -31,42 +31,6 @@ extern void ret_from_kernel_thread(void);
# endif /* __ASSEMBLY__ */
# ifndef CONFIG_MMU
/*
* User space process size: memory size
*
* TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both
* user processes and the kernel is on the same memory region. They
* both share the memory space and that is limited by the amount of
* physical memory. thus, we set TASK_SIZE == amount of total memory.
*/
# define TASK_SIZE (0x81000000 - 0x80000000)
/*
* This decides where the kernel will search for a free chunk of vm
* space during mmap's. We won't be using it
*/
# define TASK_UNMAPPED_BASE 0
/* definition in include/linux/sched.h */
struct task_struct;
/* thread_struct is gone. use thread_info instead. */
struct thread_struct { };
# define INIT_THREAD { }
/* Free all resources held by a thread. */
static inline void release_thread(struct task_struct *dead_task)
{
}
extern unsigned long get_wchan(struct task_struct *p);
# define KSTK_EIP(tsk) (0)
# define KSTK_ESP(tsk) (0)
# else /* CONFIG_MMU */
/*
* This is used to define STACK_TOP, and with MMU it must be below
* kernel base to select the correct PGD when handling MMU exceptions.
......@@ -130,5 +94,4 @@ extern struct dentry *of_debugfs_root;
#endif
# endif /* __ASSEMBLY__ */
# endif /* CONFIG_MMU */
#endif /* _ASM_MICROBLAZE_PROCESSOR_H */
arch/microblaze/include/asm/registers.h
View file @ 66fc6a62
......@@ -27,7 +27,6 @@
#define FSR_UF (1<<1) /* Underflow */
#define FSR_DO (1<<0) /* Denormalized operand error */
# ifdef CONFIG_MMU
/* Machine State Register (MSR) Fields */
# define MSR_UM (1<<11) /* User Mode */
# define MSR_UMS (1<<12) /* User Mode Save */
......@@ -43,5 +42,4 @@
# define ESR_DIZ (1<<11) /* Zone Protection */
# define ESR_S (1<<10) /* Store instruction */
# endif /* CONFIG_MMU */
#endif /* _ASM_MICROBLAZE_REGISTERS_H */
arch/microblaze/include/asm/setup.h
View file @ 66fc6a62
......@@ -14,9 +14,7 @@ extern char cmd_line[COMMAND_LINE_SIZE];
extern char *klimit;
# ifdef CONFIG_MMU
extern void mmu_reset(void);
# endif /* CONFIG_MMU */
void time_init(void);
void init_IRQ(void);
......
arch/microblaze/include/asm/thread_info.h
View file @ 66fc6a62
......@@ -107,6 +107,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
/* restore singlestep on return to user mode */
#define TIF_SINGLESTEP 4
#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
#define TIF_SECCOMP 10 /* secure computing */
......@@ -119,6 +120,7 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
......
arch/microblaze/include/asm/tlbflush.h
View file @ 66fc6a62
......@@ -8,8 +8,6 @@
#ifndef _ASM_MICROBLAZE_TLBFLUSH_H
#define _ASM_MICROBLAZE_TLBFLUSH_H
#ifdef CONFIG_MMU
#include <linux/sched.h>
#include <linux/threads.h>
#include <asm/processor.h> /* For TASK_SIZE */
......@@ -50,16 +48,4 @@ static inline void local_flush_tlb_range(struct vm_area_struct *vma,
static inline void flush_tlb_pgtables(struct mm_struct *mm,
unsigned long start, unsigned long end) { }
#else /* CONFIG_MMU */
#define flush_tlb() BUG()
#define flush_tlb_all() BUG()
#define flush_tlb_mm(mm) BUG()
#define flush_tlb_page(vma, addr) BUG()
#define flush_tlb_range(mm, start, end) BUG()
#define flush_tlb_pgtables(mm, start, end) BUG()
#define flush_tlb_kernel_range(start, end) BUG()
#endif /* CONFIG_MMU */
#endif /* _ASM_MICROBLAZE_TLBFLUSH_H */
arch/microblaze/include/asm/uaccess.h
View file @ 66fc6a62
......@@ -30,35 +30,14 @@
*/
# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
# ifndef CONFIG_MMU
# define KERNEL_DS MAKE_MM_SEG(0)
# define USER_DS KERNEL_DS
# else
# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
# endif
# define get_fs() (current_thread_info()->addr_limit)
# define set_fs(val) (current_thread_info()->addr_limit = (val))
# define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
#ifndef CONFIG_MMU
/* Check against bounds of physical memory */
static inline int ___range_ok(unsigned long addr, unsigned long size)
{
return ((addr < memory_start) ||
((addr + size - 1) > (memory_start + memory_size - 1)));
}
#define __range_ok(addr, size) \
___range_ok((unsigned long)(addr), (unsigned long)(size))
#define access_ok(addr, size) (__range_ok((addr), (size)) == 0)
#else
static inline int access_ok(const void __user *addr, unsigned long size)
{
if (!size)
......@@ -77,15 +56,9 @@ static inline int access_ok(const void __user *addr, unsigned long size)
(u32)get_fs().seg);
return 1;
}
#endif
#ifdef CONFIG_MMU
# define __FIXUP_SECTION ".section .fixup,\"ax\"\n"
# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
#else
# define __FIXUP_SECTION ".section .discard,\"ax\"\n"
# define __EX_TABLE_SECTION ".section .discard,\"ax\"\n"
#endif
extern unsigned long __copy_tofrom_user(void __user *to,
const void __user *from, unsigned long size);
......
arch/microblaze/kernel/Makefile
View file @ 66fc6a62
......@@ -22,9 +22,9 @@ obj-y += dma.o exceptions.o \
obj-y += cpu/
obj-$(CONFIG_MODULES) += microblaze_ksyms.o module.o
obj-$(CONFIG_MMU) += misc.o
obj-y += misc.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o mcount.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-y += entry$(MMU).o
obj-y += entry.o
arch/microblaze/kernel/asm-offsets.c
View file @ 66fc6a62
......@@ -70,7 +70,6 @@ int main(int argc, char *argv[])
/* struct task_struct */
DEFINE(TS_THREAD_INFO, offsetof(struct task_struct, stack));
#ifdef CONFIG_MMU
DEFINE(TASK_STATE, offsetof(struct task_struct, state));
DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
......@@ -84,7 +83,6 @@ int main(int argc, char *argv[])
DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
BLANK();
#endif
/* struct thread_info */
DEFINE(TI_TASK, offsetof(struct thread_info, task));
......
arch/microblaze/kernel/entry-nommu.S deleted 100644 → 0
View file @ 7acfd427
This diff is collapsed.
arch/microblaze/kernel/exceptions.c
View file @ 66fc6a62
......@@ -69,9 +69,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
int fsr, int addr)
{
#ifdef CONFIG_MMU
addr = regs->pc;
#endif
#if 0
pr_warn("Exception %02x in %s mode, FSR=%08x PC=%08x ESR=%08x\n",
......@@ -132,13 +130,10 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
fsr = FPE_FLTRES;
_exception(SIGFPE, regs, fsr, addr);
break;
#ifdef CONFIG_MMU
case MICROBLAZE_PRIVILEGED_EXCEPTION:
pr_debug("Privileged exception\n");
_exception(SIGILL, regs, ILL_PRVOPC, addr);
break;
#endif
default:
/* FIXME what to do in unexpected exception */
pr_warn("Unexpected exception %02x PC=%08x in %s mode\n",
......
arch/microblaze/kernel/head.S
View file @ 66fc6a62
......@@ -34,7 +34,6 @@
#include <asm/page.h>
#include <linux/of_fdt.h> /* for OF_DT_HEADER */
#ifdef CONFIG_MMU
#include <asm/setup.h> /* COMMAND_LINE_SIZE */
#include <asm/mmu.h>
#include <asm/processor.h>
......@@ -48,8 +47,6 @@ empty_zero_page:
swapper_pg_dir:
.space PAGE_SIZE
#endif /* CONFIG_MMU */
.section .rodata
.align 4
endian_check:
......@@ -108,8 +105,6 @@ _copy_fdt:
addik r3, r3, -4 /* descrement loop */
no_fdt_arg:
#ifdef CONFIG_MMU
#ifndef CONFIG_CMDLINE_BOOL
/*
* handling command line
......@@ -329,7 +324,6 @@ turn_on_mmu:
nop
start_here:
#endif /* CONFIG_MMU */
/* Initialize small data anchors */
addik r13, r0, _KERNEL_SDA_BASE_
......@@ -345,11 +339,6 @@ start_here:
brald r15, r11
nop
#ifndef CONFIG_MMU
addik r15, r0, machine_halt
braid start_kernel
nop
#else
/*
* Initialize the MMU.
*/
......@@ -383,4 +372,3 @@ kernel_load_context:
nop
rted r17, 0 /* enable MMU and jump to start_kernel */
nop
#endif /* CONFIG_MMU */
arch/microblaze/kernel/hw_exception_handler.S
View file @ 66fc6a62
......@@ -80,7 +80,6 @@
/* Helpful Macros */
#define NUM_TO_REG(num) r ## num
#ifdef CONFIG_MMU
#define RESTORE_STATE \
lwi r5, r1, 0; \
mts rmsr, r5; \
......@@ -92,7 +91,6 @@
lwi r11, r1, PT_R11; \
lwi r31, r1, PT_R31; \
lwi r1, r1, PT_R1;
#endif /* CONFIG_MMU */
#define LWREG_NOP \
bri ex_handler_unhandled; \
......@@ -102,10 +100,6 @@
bri ex_handler_unhandled; \
nop;
/* FIXME this is weird - for noMMU kernel is not possible to use brid
* instruction which can shorten executed time
*/
/* r3 is the source */
#define R3_TO_LWREG_V(regnum) \
swi r3, r1, 4 * regnum; \
......@@ -126,7 +120,6 @@
or r3, r0, NUM_TO_REG (regnum); \
bri ex_sw_tail;
#ifdef CONFIG_MMU
#define R3_TO_LWREG_VM_V(regnum) \
brid ex_lw_end_vm; \
swi r3, r7, 4 * regnum;
......@@ -193,7 +186,6 @@
.endm
#endif
#endif /* CONFIG_MMU */
.extern other_exception_handler /* Defined in exception.c */
......@@ -251,7 +243,6 @@
*/
/* wrappers to restore state before coming to entry.S */
#ifdef CONFIG_MMU
.section .data
.align 4
pt_pool_space:
......@@ -316,31 +307,24 @@ _MB_HW_ExceptionVectorTable:
.long TOPHYS(ex_handler_unhandled)
.long TOPHYS(ex_handler_unhandled)
.long TOPHYS(ex_handler_unhandled)
#endif
.global _hw_exception_handler
.section .text
.align 4
.ent _hw_exception_handler
_hw_exception_handler:
#ifndef CONFIG_MMU
addik r1, r1, -(EX_HANDLER_STACK_SIZ); /* Create stack frame */
#else
swi r1, r0, TOPHYS(pt_pool_space + PT_R1); /* GET_SP */
/* Save date to kernel memory. Here is the problem
* when you came from user space */
ori r1, r0, TOPHYS(pt_pool_space);
#endif
swi r3, r1, PT_R3
swi r4, r1, PT_R4
swi r5, r1, PT_R5
swi r6, r1, PT_R6
#ifdef CONFIG_MMU
swi r11, r1, PT_R11
swi r31, r1, PT_R31
lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)) /* get saved current */
#endif
mfs r5, rmsr;
nop
......@@ -350,18 +334,8 @@ _hw_exception_handler:
mfs r3, rear;
nop
#ifndef CONFIG_MMU
andi r5, r4, 0x1000; /* Check ESR[DS] */
beqi r5, not_in_delay_slot; /* Branch if ESR[DS] not set */
mfs r17, rbtr; /* ESR[DS] set - return address in BTR */
nop
not_in_delay_slot:
swi r17, r1, PT_R17
#endif
andi r5, r4, 0x1F; /* Extract ESR[EXC] */
#ifdef CONFIG_MMU
/* Calculate exception vector offset = r5 << 2 */
addk r6, r5, r5; /* << 1 */
addk r6, r6, r6; /* << 2 */
......@@ -383,73 +357,6 @@ not_in_delay_slot:
full_exception_trapw:
RESTORE_STATE
bri full_exception_trap
#else
/* Exceptions enabled here. This will allow nested exceptions */
mfs r6, rmsr;
nop
swi r6, r1, 0; /* RMSR_OFFSET */
ori r6, r6, 0x100; /* Turn ON the EE bit */
andi r6, r6, ~2; /* Disable interrupts */
mts rmsr, r6;
nop
xori r6, r5, 1; /* 00001 = Unaligned Exception */
/* Jump to unalignment exception handler */
beqi r6, handle_unaligned_ex;
handle_other_ex: /* Handle Other exceptions here */
/* Save other volatiles before we make procedure calls below */
swi r7, r1, PT_R7
swi r8, r1, PT_R8
swi r9, r1, PT_R9
swi r10, r1, PT_R10
swi r11, r1, PT_R11
swi r12, r1, PT_R12
swi r14, r1, PT_R14
swi r15, r1, PT_R15
swi r18, r1, PT_R18
or r5, r1, r0
andi r6, r4, 0x1F; /* Load ESR[EC] */
lwi r7, r0, PER_CPU(KM) /* MS: saving current kernel mode to regs */
swi r7, r1, PT_MODE
mfs r7, rfsr
nop
addk r8, r17, r0; /* Load exception address */
bralid r15, full_exception; /* Branch to the handler */
nop;
mts rfsr, r0; /* Clear sticky fsr */
nop
/*
* Trigger execution of the signal handler by enabling
* interrupts and calling an invalid syscall.
*/
mfs r5, rmsr;
nop
ori r5, r5, 2;
mts rmsr, r5; /* enable interrupt */
nop
addi r12, r0, __NR_syscalls;
brki r14, 0x08;
mfs r5, rmsr; /* disable interrupt */
nop
andi r5, r5, ~2;
mts rmsr, r5;
nop
lwi r7, r1, PT_R7
lwi r8, r1, PT_R8
lwi r9, r1, PT_R9
lwi r10, r1, PT_R10
lwi r11, r1, PT_R11
lwi r12, r1, PT_R12
lwi r14, r1, PT_R14
lwi r15, r1, PT_R15
lwi r18, r1, PT_R18
bri ex_handler_done; /* Complete exception handling */
#endif
/* 0x01 - Unaligned data access exception
* This occurs when a word access is not aligned on a word boundary,
......@@ -463,7 +370,6 @@ handle_unaligned_ex:
* R4 = ESR
* R3 = EAR
*/
#ifdef CONFIG_MMU
andi r6, r4, 0x1000 /* Check ESR[DS] */
beqi r6, _no_delayslot /* Branch if ESR[DS] not set */
mfs r17, rbtr; /* ESR[DS] set - return address in BTR */
......@@ -472,7 +378,7 @@ _no_delayslot:
/* jump to high level unaligned handler */
RESTORE_STATE;
bri unaligned_data_trap
#endif
andi r6, r4, 0x3E0; /* Mask and extract the register operand */
srl r6, r6; /* r6 >> 5 */
srl r6, r6;
......@@ -558,25 +464,10 @@ ex_shw:
ex_sw_end: /* Exception handling of store word, ends. */
ex_handler_done:
#ifndef CONFIG_MMU
lwi r5, r1, 0 /* RMSR */
mts rmsr, r5
nop
lwi r3, r1, PT_R3
lwi r4, r1, PT_R4
lwi r5, r1, PT_R5
lwi r6, r1, PT_R6
lwi r17, r1, PT_R17
rted r17, 0
addik r1, r1, (EX_HANDLER_STACK_SIZ); /* Restore stack frame */
#else
RESTORE_STATE;
rted r17, 0
nop
#endif
#ifdef CONFIG_MMU
/* Exception vector entry code. This code runs with address translation
* turned off (i.e. using physical addresses). */
......@@ -882,13 +773,7 @@ ex_handler_done:
* bits 20 and 21 are zero.
*/
andi r3, r3, PAGE_MASK
#ifdef CONFIG_MICROBLAZE_64K_PAGES
ori r3, r3, TLB_VALID | TLB_PAGESZ(PAGESZ_64K)
#elif CONFIG_MICROBLAZE_16K_PAGES
ori r3, r3, TLB_VALID | TLB_PAGESZ(PAGESZ_16K)
#else
ori r3, r3, TLB_VALID | TLB_PAGESZ(PAGESZ_4K)
#endif
mts rtlbhi, r3 /* Load TLB HI */
nop
......@@ -926,10 +811,8 @@ ex_handler_done:
rtsd r15,8
nop
#endif
.end _hw_exception_handler
#ifdef CONFIG_MMU
/* Unaligned data access exception last on a 4k page for MMU.
* When this is called, we are in virtual mode with exceptions enabled
* and registers 1-13,15,17,18 saved.
......@@ -1044,7 +927,6 @@ ex_unaligned_fixup:
.word store6,ex_unaligned_fixup;
.previous;
.end _unaligned_data_exception
#endif /* CONFIG_MMU */
.global ex_handler_unhandled
ex_handler_unhandled:
......@@ -1093,11 +975,7 @@ lw_r27: R3_TO_LWREG (27);
lw_r28: R3_TO_LWREG (28);
lw_r29: R3_TO_LWREG (29);
lw_r30: R3_TO_LWREG (30);
#ifdef CONFIG_MMU
lw_r31: R3_TO_LWREG_V (31);
#else
lw_r31: R3_TO_LWREG (31);
#endif
sw_table:
sw_r0: SWREG_TO_R3 (0);
......@@ -1131,13 +1009,8 @@ sw_r27: SWREG_TO_R3 (27);
sw_r28: SWREG_TO_R3 (28);
sw_r29: SWREG_TO_R3 (29);
sw_r30: SWREG_TO_R3 (30);
#ifdef CONFIG_MMU
sw_r31: SWREG_TO_R3_V (31);
#else
sw_r31: SWREG_TO_R3 (31);
#endif
#ifdef CONFIG_MMU
lw_table_vm:
lw_r0_vm: R3_TO_LWREG_VM (0);
lw_r1_vm: R3_TO_LWREG_VM_V (1);
......@@ -1205,7 +1078,6 @@ sw_r28_vm: SWREG_TO_R3_VM_V (28);
sw_r29_vm: SWREG_TO_R3_VM_V (29);
sw_r30_vm: SWREG_TO_R3_VM_V (30);
sw_r31_vm: SWREG_TO_R3_VM_V (31);
#endif /* CONFIG_MMU */
/* Temporary data structures used in the handler */
.section .data
......
arch/microblaze/kernel/microblaze_ksyms.c
View file @ 66fc6a62
......@@ -33,9 +33,7 @@ EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memmove);
#endif
#ifdef CONFIG_MMU
EXPORT_SYMBOL(empty_zero_page);
#endif
EXPORT_SYMBOL(mbc);
......
arch/microblaze/kernel/process.c
View file @ 66fc6a62
......@@ -69,9 +69,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
ti->cpu_context.r19 = (unsigned long)arg;
childregs->pt_mode = 1;
local_save_flags(childregs->msr);
#ifdef CONFIG_MMU
ti->cpu_context.msr = childregs->msr & ~MSR_IE;
#endif
ti->cpu_context.r15 = (unsigned long)ret_from_kernel_thread - 8;
return 0;
}
......@@ -81,9 +79,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
ti->cpu_context.r1 = (unsigned long)childregs;
#ifndef CONFIG_MMU
ti->cpu_context.msr = (unsigned long)childregs->msr;
#else
childregs->msr |= MSR_UMS;
/* we should consider the fact that childregs is a copy of the parent
......@@ -105,7 +100,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
ti->cpu_context.msr = (childregs->msr|MSR_VM);
ti->cpu_context.msr &= ~MSR_UMS; /* switch_to to kernel mode */
ti->cpu_context.msr &= ~MSR_IE;
#endif
ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8;
/*
......@@ -130,13 +124,10 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp)
regs->pc = pc;
regs->r1 = usp;
regs->pt_mode = 0;
#ifdef CONFIG_MMU
regs->msr |= MSR_UMS;
regs->msr &= ~MSR_VM;
#endif
}
#ifdef CONFIG_MMU
#include <linux/elfcore.h>
/*
* Set up a thread for executing a new program
......@@ -145,7 +136,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
{
return 0; /* MicroBlaze has no separate FPU registers */
}
#endif /* CONFIG_MMU */
void arch_cpu_idle(void)
{
......
arch/microblaze/kernel/setup.c
View file @ 66fc6a62
......@@ -9,7 +9,7 @@
*/
#include <linux/init.h>
#include <linux/clk-provider.h>
#include <linux/of_clk.h>
#include <linux/clocksource.h>
#include <linux/string.h>
#include <linux/seq_file.h>
......@@ -190,12 +190,10 @@ static int microblaze_debugfs_init(void)
}
arch_initcall(microblaze_debugfs_init);
# ifdef CONFIG_MMU
static int __init debugfs_tlb(void)
{
debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip);
return 0;
}
device_initcall(debugfs_tlb);
# endif
#endif
arch/microblaze/kernel/signal.c
View file @ 66fc6a62
......@@ -157,10 +157,8 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
struct rt_sigframe __user *frame;
int err = 0, sig = ksig->sig;
unsigned long address = 0;
#ifdef CONFIG_MMU
pmd_t *pmdp;
pte_t *ptep;
#endif
frame = get_sigframe(ksig, regs, sizeof(*frame));
......@@ -192,7 +190,6 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
regs->r15 = ((unsigned long)frame->tramp)-8;
address = ((unsigned long)frame->tramp);
#ifdef CONFIG_MMU
pmdp = pmd_off(current->mm, address);
preempt_disable();
......@@ -208,10 +205,6 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
}
pte_unmap(ptep);
preempt_enable();
#else
flush_icache_range(address, address + 8);
flush_dcache_range(address, address + 8);
#endif
if (err)
return -EFAULT;
......@@ -313,7 +306,8 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
{
if (test_thread_flag(TIF_SIGPENDING))
if (test_thread_flag(TIF_SIGPENDING) ||
test_thread_flag(TIF_NOTIFY_SIGNAL))
do_signal(regs, in_syscall);
if (test_thread_flag(TIF_NOTIFY_RESUME))
......
arch/microblaze/kernel/unwind.c
View file @ 66fc6a62
......@@ -161,22 +161,12 @@ static void microblaze_unwind_inner(struct task_struct *task,
* unwind_trap - Unwind through a system trap, that stored previous state
* on the stack.
*/
#ifdef CONFIG_MMU
static inline void unwind_trap(struct task_struct *task, unsigned long pc,
unsigned long fp, struct stack_trace *trace,
const char *loglvl)
{
/* To be implemented */
}
#else
static inline void unwind_trap(struct task_struct *task, unsigned long pc,
unsigned long fp, struct stack_trace *trace,
const char *loglvl)
{
const struct pt_regs *regs = (const struct pt_regs *) fp;
microblaze_unwind_inner(task, regs->pc, regs->r1, regs->r15, trace, loglvl);
}
#endif
/**
* microblaze_unwind_inner - Unwind the stack from the specified point
......@@ -215,16 +205,7 @@ static void microblaze_unwind_inner(struct task_struct *task,
* HW exception handler doesn't save all registers,
* so we open-code a special case of unwind_trap()
*/
#ifndef CONFIG_MMU
const struct pt_regs *regs =
(const struct pt_regs *) fp;
#endif
printk("%sHW EXCEPTION\n", loglvl);
#ifndef CONFIG_MMU
microblaze_unwind_inner(task, regs->r17 - 4,
fp + EX_HANDLER_STACK_SIZ,
regs->r15, trace, loglvl);
#endif
return;
}
......
arch/microblaze/mm/Makefile
View file @ 66fc6a62
......@@ -3,6 +3,4 @@
# Makefile
#
obj-y := consistent.o init.o
obj-$(CONFIG_MMU) += pgtable.o mmu_context.o fault.o
obj-y := consistent.o init.o pgtable.o mmu_context.o fault.o
arch/microblaze/mm/consistent.c
View file @ 66fc6a62
......@@ -21,32 +21,3 @@ void arch_dma_prep_coherent(struct page *page, size_t size)
flush_dcache_range(paddr, paddr + size);
}
#ifndef CONFIG_MMU
/*
* Consistent memory allocators. Used for DMA devices that want to share
* uncached memory with the processor core. My crufty no-MMU approach is
* simple. In the HW platform we can optionally mirror the DDR up above the
* processor cacheable region. So, memory accessed in this mirror region will
* not be cached. It's alloced from the same pool as normal memory, but the
* handle we return is shifted up into the uncached region. This will no doubt
* cause big problems if memory allocated here is not also freed properly. -- JW
*
* I have to use dcache values because I can't relate on ram size:
*/
#ifdef CONFIG_XILINX_UNCACHED_SHADOW
#define UNCACHED_SHADOW_MASK (cpuinfo.dcache_high - cpuinfo.dcache_base + 1)
#else
#define UNCACHED_SHADOW_MASK 0
#endif /* CONFIG_XILINX_UNCACHED_SHADOW */
void *arch_dma_set_uncached(void *ptr, size_t size)
{
unsigned long addr = (unsigned long)ptr;
addr |= UNCACHED_SHADOW_MASK;
if (addr > cpuinfo.dcache_base && addr < cpuinfo.dcache_high)
pr_warn("ERROR: Your cache coherent area is CACHED!!!\n");
return (void *)addr;
}
#endif /* CONFIG_MMU */
arch/microblaze/mm/init.c
View file @ 66fc6a62
......@@ -29,11 +29,6 @@
/* Use for MMU and noMMU because of PCI generic code */
int mem_init_done;
#ifndef CONFIG_MMU
unsigned int __page_offset;
EXPORT_SYMBOL(__page_offset);
#endif /* CONFIG_MMU */
char *klimit = _end;
/*
......@@ -77,13 +72,11 @@ static void highmem_setup(void)
static void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
#ifdef CONFIG_MMU
int idx;
/* Setup fixmaps */
for (idx = 0; idx < __end_of_fixed_addresses; idx++)
clear_fixmap(idx);
#endif
/* Clean every zones */
memset(zones_size, 0, sizeof(zones_size));
......@@ -103,40 +96,6 @@ static void __init paging_init(void)
void __init setup_memory(void)
{
#ifndef CONFIG_MMU
u32 kernel_align_start, kernel_align_size;
phys_addr_t start, end;
u64 i;
/* Find main memory where is the kernel */
for_each_mem_range(i, &start, &end) {
memory_start = start;
lowmem_size = end - start;
if ((memory_start <= (u32)_text) &&
((u32)_text <= (memory_start + lowmem_size - 1))) {
memory_size = lowmem_size;
PAGE_OFFSET = memory_start;
pr_info("%s: Main mem: 0x%x, size 0x%08x\n",
__func__, (u32) memory_start,
(u32) memory_size);
break;
}
}
if (!memory_start || !memory_size) {
panic("%s: Missing memory setting 0x%08x, size=0x%08x\n",
__func__, (u32) memory_start, (u32) memory_size);
}
/* reservation of region where is the kernel */
kernel_align_start = PAGE_DOWN((u32)_text);
/* ALIGN can be remove because _end in vmlinux.lds.S is align */
kernel_align_size = PAGE_UP((u32)klimit) - kernel_align_start;
pr_info("%s: kernel addr:0x%08x-0x%08x size=0x%08x\n",
__func__, kernel_align_start, kernel_align_start
+ kernel_align_size, kernel_align_size);
memblock_reserve(kernel_align_start, kernel_align_size);
#endif
/*
* Kernel:
* start: base phys address of kernel - page align
......@@ -176,12 +135,6 @@ void __init mem_init(void)
mem_init_done = 1;
}
#ifndef CONFIG_MMU
int page_is_ram(unsigned long pfn)
{
return __range_ok(pfn, 0);
}
#else
int page_is_ram(unsigned long pfn)
{
return pfn < max_low_pfn;
......@@ -325,8 +278,6 @@ void __init *early_get_page(void)
NUMA_NO_NODE);
}
#endif /* CONFIG_MMU */
void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask)
{
void *p;
......
arch/microblaze/pci/pci-common.c
View file @ 66fc6a62
......@@ -325,12 +325,10 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus,
* memory, effectively behaving just like /dev/zero
*/
if ((offset + size) > hose->isa_mem_size) {
#ifdef CONFIG_MMU
pr_debug("Process %s (pid:%d) mapped non-existing PCI",
current->comm, current->pid);
pr_debug("legacy memory for 0%04x:%02x\n",
pci_domain_nr(bus), bus->number);
#endif
if (vma->vm_flags & VM_SHARED)
return shmem_zero_setup(vma);
return 0;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7