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nova: adjust phys and io_mem allocator

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Add comments about the way the allocator are filled and make solely acpi
related memory as io_mem available to platform.
This commit is contained in:
Alexander Boettcher 2015-05-11 14:43:56 +02:00 committed by Christian Helmuth
parent c6417051ce
commit 24a4e486c4
1 changed files with 15 additions and 2 deletions
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17
repos/base-nova/src/core/platform.cc
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@ -341,6 +341,11 @@ Platform::Platform() :
/* initialize core's physical-memory and I/O memory allocator */
_io_mem_alloc.add_range(0, ~0xfffUL);
Hip::Mem_desc *mem_desc = (Hip::Mem_desc *)mem_desc_base;
/*
* All "available" ram must be added to our physical allocator before all
* non "available" regions that overlaps with ram get removed.
*/
for (unsigned i = 0; i < num_mem_desc; i++, mem_desc++) {
if (mem_desc->type != Hip::Mem_desc::AVAILABLE_MEMORY) continue;
@ -366,7 +371,11 @@ Platform::Platform() :
ram_alloc()->add_range(base, size);
}
/* exclude all non-available memory from physical allocator */
/*
* Exclude all non-available memory from physical allocator AFTER all
* available RAM was added - otherwise the non-available memory gets not
* properly removed from the physical allocator
*/
mem_desc = (Hip::Mem_desc *)mem_desc_base;
for (unsigned i = 0; i < num_mem_desc; i++, mem_desc++) {
if (mem_desc->type == Hip::Mem_desc::AVAILABLE_MEMORY) continue;
@ -382,7 +391,11 @@ Platform::Platform() :
else
size = round_page(mem_desc->addr + mem_desc->size) - base;
_io_mem_alloc.add_range(base, size);
/* make acpi regions as io_mem available to platform driver */
if (mem_desc->type == Hip::Mem_desc::ACPI_RECLAIM_MEMORY ||
mem_desc->type == Hip::Mem_desc::ACPI_NVS_MEMORY)
_io_mem_alloc.add_range(base, size);
ram_alloc()->remove_range(base, size);
}