ExternalVendorCode/genode
1
0
Fork 0
mirror of https://github.com/genodelabs/genode.git synced 2025-04-15 15:07:16 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

hw: correctly flush cache on ARM (fix #1257)

Browse Source 
* When flushing the data and unified cache on ARM, clean and invalidate
  instead of just cleaning the corresponding cache lines
* After zero-ing a freshly constructed dataspace in core, invalidate
  corresponding cache lines from the instruction cache
This commit is contained in:
Stefan Kalkowski 2014-09-25 10:35:44 +02:00 committed by Christian Helmuth
parent 23dcbff998
commit 3befb64afe
2 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
repos/base-hw/src/core/include/spec/arm/cpu_support.h
View File

@ -192,12 +192,12 @@ class Genode::Arm
};
/**
* Data Cache Clean by MVA to PoC
* Data Cache Clean and Invalidate by MVA to PoC
*/
struct Dccmvac : Register<32>
struct Dccimvac : Register<32>
{
static void write(access_t const v) {
asm volatile ("mcr p15, 0, %0, c7, c10, 1" :: "r" (v) : ); }
asm volatile ("mcr p15, 0, %0, c7, c14, 1" :: "r" (v) : ); }
};
/**
@ -495,7 +495,7 @@ class Genode::Arm
{
addr_t const top = base + size;
base &= line_align_mask;
for (; base < top; base += line_size) { Dccmvac::write(base); }
for (; base < top; base += line_size) { Dccimvac::write(base); }
}
/**

5
repos/base-hw/src/core/ram_session_support.cc
View File

@ -50,10 +50,13 @@ void Ram_session_component::_clear_ds (Dataspace_component * ds)
/* clear dataspace */
memset(virt_addr, 0, page_rounded_size);
/* uncached dataspaces need to be flushed */
/* uncached dataspaces need to be flushed from the data cache */
if (ds->cacheability() != CACHED)
Kernel::update_data_region((addr_t)virt_addr, page_rounded_size);
/* invalidate the dataspace memory from instruction cache */
Kernel::update_instr_region((addr_t)virt_addr, page_rounded_size);
/* unmap dataspace from core */
if (!unmap_local((addr_t)virt_addr, num_pages))
PERR("could not unmap core-local address range at %p", virt_addr);