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sel4: initialization of core's allocators

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This commit is contained in:
Norman Feske 2015-05-02 17:48:07 +02:00 committed by Christian Helmuth
parent 633f335171
commit de8bfb37f9
1 changed files with 71 additions and 9 deletions
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80
repos/base-sel4/src/core/platform.cc
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@ -21,6 +21,10 @@
#include <platform.h>
#include <map_local.h>
/* seL4 includes */
#include <sel4/bootinfo.h>
#include <sel4/interfaces/sel4_client.h>
using namespace Genode;
static bool const verbose_boot_info = true;
@ -57,23 +61,81 @@ bool Core_mem_allocator::Mapped_mem_allocator::_unmap_local(addr_t virt_addr,
** Platform interface **
************************/
Platform::Platform() :
_io_mem_alloc(core_mem_alloc()), _io_port_alloc(core_mem_alloc()),
_irq_alloc(core_mem_alloc()), _vm_base(0), _vm_size(0)
/**
* Obtain seL4 boot info structure
*/
static seL4_BootInfo const &sel4_boot_info()
{
/* initialize core allocators */
extern Genode::addr_t __initial_bx;
return *(seL4_BootInfo const *)__initial_bx;
}
/**
* Initialize allocator with untyped memory ranges according to the boot info
*/
static void init_allocator(Range_allocator &alloc, seL4_BootInfo const &bi,
unsigned const start_idx, unsigned const num_idx)
{
for (unsigned i = start_idx; i < start_idx + num_idx; i++) {
/* index into 'untypedPaddrList' and 'untypedSizeBitsList' */
unsigned const k = i - bi.untyped.start;
addr_t const base = bi.untypedPaddrList[k];
size_t const size = 1UL << bi.untypedSizeBitsList[k];
alloc.add_range(base, size);
}
}
Platform::Platform()
:
_io_mem_alloc(core_mem_alloc()), _io_port_alloc(core_mem_alloc()),
_irq_alloc(core_mem_alloc()),
_vm_base(0x1000),
_vm_size(2*1024*1024*1024UL - _vm_base) /* use the lower 2GiB */
{
/*
* Initialize core allocators
*/
seL4_BootInfo const &bi = sel4_boot_info();
/* interrupt allocator */
_irq_alloc.add_range(0, 255);
/* physical memory ranges */
init_allocator(*_core_mem_alloc.phys_alloc(), bi, bi.untyped.start,
bi.untyped.end - bi.untyped.start);
/* I/O memory ranges */
init_allocator(_io_mem_alloc, bi, bi.deviceUntyped.start,
bi.deviceUntyped.end - bi.deviceUntyped.start);
/* core's virtual memory */
_core_mem_alloc.virt_alloc()->add_range(_vm_base, _vm_size);
/* remove core image from core's virtual address allocator */
addr_t const core_virt_beg = trunc_page((addr_t)&_prog_img_beg),
core_virt_end = round_page((addr_t)&_prog_img_end);
size_t const core_size = core_virt_end - core_virt_beg;
_core_mem_alloc.virt_alloc()->remove_range(core_virt_beg, core_size);
if (verbose_boot_info) {
printf("core image:\n");
printf(" virtual address range [%08lx,%08lx) size=0x%zx\n",
core_virt_beg, core_virt_end, core_size);
}
/* preserve context area in core's virtual address space */
/* remove used core memory from physical memory allocator */
_core_mem_alloc.virt_alloc()->remove_range(Native_config::context_area_virtual_base(),
Native_config::context_area_virtual_size());
/* add boot modules to ROM fs */
/* initialize interrupt allocator */
_irq_alloc.add_range(0, 255);
/*
* Print statistics about allocator initialization
*/