summaryrefslogtreecommitdiffstats
path: root/arch/m68k
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/68000/dragen2.c2
-rw-r--r--arch/m68k/Kconfig.machine8
-rw-r--r--arch/m68k/include/asm/mcf_pgtable.h35
-rw-r--r--arch/m68k/include/asm/motorola_pgtable.h39
-rw-r--r--arch/m68k/include/asm/page.h6
-rw-r--r--arch/m68k/include/asm/page_mm.h1
-rw-r--r--arch/m68k/include/asm/page_no.h11
-rw-r--r--arch/m68k/include/asm/pgtable_no.h6
-rw-r--r--arch/m68k/include/asm/sun3_pgtable.h38
-rw-r--r--arch/m68k/kernel/setup_mm.c10
-rw-r--r--arch/m68k/kernel/traps.c4
-rw-r--r--arch/m68k/mm/fault.c5
-rw-r--r--arch/m68k/mm/motorola.c10
13 files changed, 129 insertions, 46 deletions
diff --git a/arch/m68k/68000/dragen2.c b/arch/m68k/68000/dragen2.c
index 1a57eff28cfe..7f1804e31a06 100644
--- a/arch/m68k/68000/dragen2.c
+++ b/arch/m68k/68000/dragen2.c
@@ -15,7 +15,7 @@
#include "screen.h"
/***************************************************************************/
-/* Init Drangon Engine hardware */
+/* Init Dragon Engine II hardware */
/***************************************************************************/
static void dragen2_reset(void)
diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
index 53c45ccda564..e2f961208f18 100644
--- a/arch/m68k/Kconfig.machine
+++ b/arch/m68k/Kconfig.machine
@@ -192,18 +192,18 @@ config UCSIMM
Support for the Arcturus Networks uCsimm module.
config UCDIMM
- bool "uDsimm module support"
+ bool "uCdimm module support"
depends on !MMU
select M68VZ328
help
- Support for the Arcturus Networks uDsimm module.
+ Support for the Arcturus Networks uCdimm module.
config DRAGEN2
- bool "DragenEngine II board support"
+ bool "DragonEngine II board support"
depends on !MMU
select M68VZ328
help
- Support for the DragenEngine II board.
+ Support for the DragonEngine II board.
config DIRECT_IO_ACCESS
bool "Allow user to access IO directly"
diff --git a/arch/m68k/include/asm/mcf_pgtable.h b/arch/m68k/include/asm/mcf_pgtable.h
index b619b22823f8..13741c1245e1 100644
--- a/arch/m68k/include/asm/mcf_pgtable.h
+++ b/arch/m68k/include/asm/mcf_pgtable.h
@@ -46,6 +46,9 @@
#define _CACHEMASK040 (~0x060)
#define _PAGE_GLOBAL040 0x400 /* 68040 global bit, used for kva descs */
+/* We borrow bit 24 to store the exclusive marker in swap PTEs. */
+#define _PAGE_SWP_EXCLUSIVE CF_PAGE_NOCACHE
+
/*
* Externally used page protection values.
*/
@@ -254,15 +257,41 @@ static inline pte_t pte_mkcache(pte_t pte)
extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
/*
- * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e))
+ * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
+ * are !pte_none() && !pte_present().
+ *
+ * Format of swap PTEs:
+ *
+ * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
+ * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ * <------------------ offset -------------> 0 0 0 E <-- type --->
+ *
+ * E is the exclusive marker that is not stored in swap entries.
*/
-#define __swp_type(x) ((x).val & 0xFF)
+#define __swp_type(x) ((x).val & 0x7f)
#define __swp_offset(x) ((x).val >> 11)
-#define __swp_entry(typ, off) ((swp_entry_t) { (typ) | \
+#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) & 0x7f) | \
(off << 11) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) (__pte((x).val))
+static inline int pte_swp_exclusive(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
+}
+
+static inline pte_t pte_swp_mkexclusive(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
+static inline pte_t pte_swp_clear_exclusive(pte_t pte)
+{
+ pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
#define pmd_pfn(pmd) (pmd_val(pmd) >> PAGE_SHIFT)
#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h
index 7ac3d64c6b33..ec0dc19ab834 100644
--- a/arch/m68k/include/asm/motorola_pgtable.h
+++ b/arch/m68k/include/asm/motorola_pgtable.h
@@ -41,6 +41,9 @@
#define _PAGE_PROTNONE 0x004
+/* We borrow bit 11 to store the exclusive marker in swap PTEs. */
+#define _PAGE_SWP_EXCLUSIVE 0x800
+
#ifndef __ASSEMBLY__
/* This is the cache mode to be used for pages containing page descriptors for
@@ -124,7 +127,7 @@ static inline void pud_set(pud_t *pudp, pmd_t *pmdp)
* expects pmd_page() to exists, only to then DCE it all. Provide a dummy to
* make the compiler happy.
*/
-#define pmd_page(pmd) NULL
+#define pmd_page(pmd) ((struct page *)NULL)
#define pud_none(pud) (!pud_val(pud))
@@ -169,12 +172,40 @@ static inline pte_t pte_mkcache(pte_t pte)
#define swapper_pg_dir kernel_pg_dir
extern pgd_t kernel_pg_dir[128];
-/* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) */
-#define __swp_type(x) (((x).val >> 4) & 0xff)
+/*
+ * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
+ * are !pte_none() && !pte_present().
+ *
+ * Format of swap PTEs:
+ *
+ * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
+ * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ * <----------------- offset ------------> E <-- type ---> 0 0 0 0
+ *
+ * E is the exclusive marker that is not stored in swap entries.
+ */
+#define __swp_type(x) (((x).val >> 4) & 0x7f)
#define __swp_offset(x) ((x).val >> 12)
-#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 4) | ((offset) << 12) })
+#define __swp_entry(type, offset) ((swp_entry_t) { (((type) & 0x7f) << 4) | ((offset) << 12) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+static inline int pte_swp_exclusive(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
+}
+
+static inline pte_t pte_swp_mkexclusive(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
+static inline pte_t pte_swp_clear_exclusive(pte_t pte)
+{
+ pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
#endif /* !__ASSEMBLY__ */
#endif /* _MOTOROLA_PGTABLE_H */
diff --git a/arch/m68k/include/asm/page.h b/arch/m68k/include/asm/page.h
index 2f1c54e4725d..a5993ad83ed8 100644
--- a/arch/m68k/include/asm/page.h
+++ b/arch/m68k/include/asm/page.h
@@ -62,11 +62,7 @@ extern unsigned long _ramend;
#include <asm/page_no.h>
#endif
-#ifndef CONFIG_MMU
-#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
-#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
-#endif
-
#include <asm-generic/getorder.h>
+#include <asm-generic/memory_model.h>
#endif /* _M68K_PAGE_H */
diff --git a/arch/m68k/include/asm/page_mm.h b/arch/m68k/include/asm/page_mm.h
index a5b459bcb7d8..3903db2e8da7 100644
--- a/arch/m68k/include/asm/page_mm.h
+++ b/arch/m68k/include/asm/page_mm.h
@@ -134,7 +134,6 @@ extern int m68k_virt_to_node_shift;
})
#define ARCH_PFN_OFFSET (m68k_memory[0].addr >> PAGE_SHIFT)
-#include <asm-generic/memory_model.h>
#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_no.h
index c9d0d84158a4..060e4c0e7605 100644
--- a/arch/m68k/include/asm/page_no.h
+++ b/arch/m68k/include/asm/page_no.h
@@ -13,9 +13,8 @@ extern unsigned long memory_end;
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
-#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
- alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
+ vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
#define __pa(vaddr) ((unsigned long)(vaddr))
#define __va(paddr) ((void *)((unsigned long)(paddr)))
@@ -26,13 +25,11 @@ extern unsigned long memory_end;
#define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
#define page_to_virt(page) __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
-#define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
-#define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
-#define pfn_valid(pfn) ((pfn) < max_mapnr)
-
#define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET) && \
((unsigned long)(kaddr) < memory_end))
+#define ARCH_PFN_OFFSET PHYS_PFN(PAGE_OFFSET_RAW)
+
#endif /* __ASSEMBLY__ */
#endif /* _M68K_PAGE_NO_H */
diff --git a/arch/m68k/include/asm/pgtable_no.h b/arch/m68k/include/asm/pgtable_no.h
index fed58da3a6b6..fc044df52b96 100644
--- a/arch/m68k/include/asm/pgtable_no.h
+++ b/arch/m68k/include/asm/pgtable_no.h
@@ -31,12 +31,6 @@
extern void paging_init(void);
#define swapper_pg_dir ((pgd_t *) 0)
-#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 })
-
/*
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h
index 90d57e537eb1..e582b0484a55 100644
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -71,6 +71,9 @@
#define SUN3_PMD_MASK (0x0000003F)
#define SUN3_PMD_MAGIC (0x0000002B)
+/* We borrow bit 6 to store the exclusive marker in swap PTEs. */
+#define _PAGE_SWP_EXCLUSIVE 0x040
+
#ifndef __ASSEMBLY__
/*
@@ -152,12 +155,41 @@ static inline pte_t pte_mkcache(pte_t pte) { return pte; }
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
-/* Macros to (de)construct the fake PTEs representing swap pages. */
-#define __swp_type(x) ((x).val & 0x7F)
+/*
+ * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
+ * are !pte_none() && !pte_present().
+ *
+ * Format of swap PTEs:
+ *
+ * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
+ * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ * 0 <--------------------- offset ----------------> E <- type -->
+ *
+ * E is the exclusive marker that is not stored in swap entries.
+ */
+#define __swp_type(x) ((x).val & 0x3f)
#define __swp_offset(x) (((x).val) >> 7)
-#define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) })
+#define __swp_entry(type, offset) ((swp_entry_t) { (((type) & 0x3f) | \
+ (((offset) << 7) & ~SUN3_PAGE_VALID)) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+static inline int pte_swp_exclusive(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
+}
+
+static inline pte_t pte_swp_mkexclusive(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
+static inline pte_t pte_swp_clear_exclusive(pte_t pte)
+{
+ pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
+ return pte;
+}
+
#endif /* !__ASSEMBLY__ */
#endif /* !_SUN3_PGTABLE_H */
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 3a2bb2e8fdad..fbff1cea62ca 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -326,16 +326,16 @@ void __init setup_arch(char **cmdline_p)
panic("No configuration setup");
}
-#ifdef CONFIG_BLK_DEV_INITRD
- if (m68k_ramdisk.size) {
+ if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && m68k_ramdisk.size)
memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
+
+ paging_init();
+
+ if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && m68k_ramdisk.size) {
initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
initrd_end = initrd_start + m68k_ramdisk.size;
pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
}
-#endif
-
- paging_init();
#ifdef CONFIG_NATFEAT
nf_init();
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index 5c8cba0efc63..a700807c9b6d 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -30,6 +30,7 @@
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/kallsyms.h>
+#include <linux/extable.h>
#include <asm/setup.h>
#include <asm/fpu.h>
@@ -545,7 +546,8 @@ static inline void bus_error030 (struct frame *fp)
errorcode |= 2;
if (mmusr & (MMU_I | MMU_WP)) {
- if (ssw & 4) {
+ /* We might have an exception table for this PC */
+ if (ssw & 4 && !search_exception_tables(fp->ptregs.pc)) {
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
ssw & RW ? "read" : "write",
fp->un.fmtb.daddr,
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 4d2837eb3e2a..228128e45c67 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -138,8 +138,11 @@ good_area:
fault = handle_mm_fault(vma, address, flags, regs);
pr_debug("handle_mm_fault returns %x\n", fault);
- if (fault_signal_pending(fault, regs))
+ if (fault_signal_pending(fault, regs)) {
+ if (!user_mode(regs))
+ goto no_context;
return 0;
+ }
/* The fault is fully completed (including releasing mmap lock) */
if (fault & VM_FAULT_COMPLETED)
diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 2a375637e007..911301224078 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -437,7 +437,7 @@ void __init paging_init(void)
}
min_addr = m68k_memory[0].addr;
- max_addr = min_addr + m68k_memory[0].size;
+ max_addr = min_addr + m68k_memory[0].size - 1;
memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0,
MEMBLOCK_NONE);
for (i = 1; i < m68k_num_memory;) {
@@ -452,21 +452,21 @@ void __init paging_init(void)
}
memblock_add_node(m68k_memory[i].addr, m68k_memory[i].size, i,
MEMBLOCK_NONE);
- addr = m68k_memory[i].addr + m68k_memory[i].size;
+ addr = m68k_memory[i].addr + m68k_memory[i].size - 1;
if (addr > max_addr)
max_addr = addr;
i++;
}
m68k_memoffset = min_addr - PAGE_OFFSET;
- m68k_virt_to_node_shift = fls(max_addr - min_addr - 1) - 6;
+ m68k_virt_to_node_shift = fls(max_addr - min_addr) - 6;
module_fixup(NULL, __start_fixup, __stop_fixup);
flush_icache();
- high_memory = phys_to_virt(max_addr);
+ high_memory = phys_to_virt(max_addr) + 1;
min_low_pfn = availmem >> PAGE_SHIFT;
- max_pfn = max_low_pfn = max_addr >> PAGE_SHIFT;
+ max_pfn = max_low_pfn = (max_addr >> PAGE_SHIFT) + 1;
/* Reserve kernel text/data/bss and the memory allocated in head.S */
memblock_reserve(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 09:50:19 +0100