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linux/arch/arm/mm
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Russell King d8dc7fbd53 ARM: re-implement physical address space switching 
Re-implement the physical address space switching to be architecturally
compliant.  This involves flushing the caches, disabling the MMU, and
only then updating the page tables.  Once that is complete, the system
can be brought back up again.

Since we disable the MMU, we need to do the update in assembly code.
Luckily, the entries which need updating are fairly trivial, and are
all setup by the early assembly code.  We can merely adjust each entry
by the delta required.

Not only does this fix the code to be architecturally compliant, but it
fixes a couple of bugs too:

1. The original code would only ever update the first L2 entry covering
   a fraction of the kernel; the remainder were left untouched.
2. The L2 entries covering the DTB blob were likewise untouched.

This solution fixes up all entries.

Tested-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-06-01 23:46:33 +01:00
..
abort-ev4.S
abort-ev4t.S
abort-ev5t.S
abort-ev5tj.S
abort-ev6.S ARM: 8128/1: abort: don't clear the exclusive monitors 2014-08-27 15:40:12 +01:00
abort-ev7.S ARM: 8128/1: abort: don't clear the exclusive monitors 2014-08-27 15:40:12 +01:00
abort-lv4t.S
abort-macro.S
abort-nommu.S
alignment.c ARM: 8322/1: keep .text and .fixup regions closer together 2015-03-29 23:11:56 +01:00
cache-aurora-l2.h ARM: 7547/4: cache-l2x0: add support for Aurora L2 cache ctrl 2012-11-06 19:47:35 +00:00
cache-fa.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
cache-feroceon-l2.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
cache-l2x0.c Merge branches 'misc', 'vdso' and 'fixes' into for-next 2015-04-14 22:28:25 +01:00
cache-nop.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
cache-tauros2.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
cache-tauros3.h ARM: 7922/1: l2x0: add Marvell Tauros3 support 2013-12-29 12:32:47 +00:00
cache-v4.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
cache-v4wb.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
cache-v4wt.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
cache-v6.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
cache-v7.S ARM: cache-v7: optimise test for Cortex A9 r0pX devices 2015-04-14 22:26:52 +01:00
cache-xsc3l2.c
context.c ARM: 8299/1: mm: ensure local active ASID is marked as allocated on rollover 2015-02-03 12:57:33 +00:00
copypage-fa.c
copypage-feroceon.c
copypage-v4mc.c
copypage-v4wb.c
copypage-v4wt.c
copypage-v6.c ARM: 8236/1: mm: fix discard_old_kernel_data 2014-12-03 16:00:04 +00:00
copypage-xsc3.c
copypage-xscale.c
dma-mapping.c Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-04-14 21:03:26 -07:00
dump.c ARM: 8249/1: mm: dump: don't skip regions 2015-01-07 20:33:33 +00:00
extable.c ARM: 7876/1: clear Thumb-2 IT state on exception handling 2013-11-07 00:15:49 +00:00
fault-armv.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
fault.c ARM: dump pgd, pmd and pte states on unhandled data abort faults 2015-03-10 19:54:56 +00:00
fault.h
flush.c ARM: 8237/1: fix flush_pfn_alias 2014-12-03 16:00:04 +00:00
fsr-2level.c
fsr-3level.c ARM: mm: Transparent huge page support for LPAE systems. 2013-06-04 16:52:38 +01:00
highmem.c Merge branch 'devel-stable' into for-next 2014-12-05 16:30:54 +00:00
hugetlbpage.c mm/hugetlb: reduce arch dependent code around follow_huge_* 2015-02-11 17:06:01 -08:00
idmap.c ARM: 8152/1: Convert pr_warning to pr_warn 2014-09-26 14:39:53 +01:00
init.c Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-04-14 21:03:26 -07:00
iomap.c
ioremap.c ARM: 8060/1: mm: allow sub-architectures to override PCI I/O memory type 2014-06-01 01:15:04 +01:00
Kconfig ARM: re-implement physical address space switching 2015-06-01 23:46:33 +01:00
l2c-common.c ARM: outer cache: add WARN_ON() to outer_disable() 2014-05-30 00:47:23 +01:00
l2c-l2x0-resume.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
Makefile ARM: re-implement physical address space switching 2015-06-01 23:46:33 +01:00
mm.h ARM: provide common method to clear bits in CPU control register 2014-06-02 09:20:11 +01:00
mmap.c mm: expose arch_mmap_rnd when available 2015-04-14 16:49:05 -07:00
mmu.c ARM: re-implement physical address space switching 2015-06-01 23:46:33 +01:00
nommu.c ARM: 8086/1: Set memblock limit for nommu 2014-06-29 10:29:34 +01:00
pabort-legacy.S
pabort-v6.S
pabort-v7.S
pageattr.c ARM: 8311/1: Don't use is_module_addr in setting page attributes 2015-03-18 10:13:46 +00:00
pgd.c mm: fix false-positive warning on exit due mm_nr_pmds(mm) 2015-02-11 17:06:04 -08:00
proc-arm7tdmi.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm9tdmi.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm720.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm740.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm920.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm922.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm925.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm926.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm940.S Merge branches 'misc', 'vdso' and 'fixes' into for-next 2015-04-14 22:28:25 +01:00
proc-arm946.S Merge branches 'misc', 'vdso' and 'fixes' into for-next 2015-04-14 22:28:25 +01:00
proc-arm1020.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm1020e.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm1022.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-arm1026.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-fa526.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-feroceon.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-macros.S Merge branches 'misc', 'vdso' and 'fixes' into for-next 2015-04-14 22:28:25 +01:00
proc-mohawk.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-sa110.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-sa1100.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-syms.c ARM: modules: don't export cpu_set_pte_ext when !MMU 2013-03-26 09:55:34 +00:00
proc-v6.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-v7-2level.S ARM: proc-v7: avoid errata 430973 workaround for non-Cortex A8 CPUs 2015-04-14 22:28:06 +01:00
proc-v7-3level.S ARM: 8164/1: mm: clear SCTLR.HA instead of setting it for LPAE 2014-09-25 15:32:57 +01:00
proc-v7.S ARM: proc-v7: avoid errata 430973 workaround for non-Cortex A8 CPUs 2015-04-14 22:28:06 +01:00
proc-v7m.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-xsc3.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
proc-xscale.S ARM: 8314/1: replace PROCINFO embedded branch with relative offset 2015-03-28 15:46:14 +00:00
pv-fixup-asm.S ARM: re-implement physical address space switching 2015-06-01 23:46:33 +01:00
tcm.h ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch() 2013-04-17 16:53:24 +01:00
tlb-fa.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
tlb-v4.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
tlb-v4wb.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
tlb-v4wbi.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
tlb-v6.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
tlb-v7.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00