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sel4: support device memory for drivers

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Additionally, exclude boot-module from page_table_registry. Core does not use
the boot-modules inside core.

Adding it otherwise to the registry will use up the meta data allocator of
the page_table_registry in core in scenarios with lot of boot modules,
e.g. noux and friends.

Issue #2044
This commit is contained in:
Alexander Boettcher 2016-06-30 17:34:24 +02:00 committed by Christian Helmuth
parent 5b9a61fcb9
commit 821afd0199
1 changed files with 33 additions and 6 deletions
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39
repos/base-sel4/src/core/platform.cc
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@ -137,10 +137,26 @@ void Platform::_init_allocators()
* '_initial_untyped_pool' because the pool is empty.
*/
/* I/O memory ranges */
// init_allocator(_io_mem_alloc, _unused_phys_alloc,
// bi, bi.deviceUntyped.start,
// bi.deviceUntyped.end - bi.deviceUntyped.start);
/* move device memory regions to phys cnode */
seL4_BootInfo const &bi = sel4_boot_info();
Cnode_base const initial_cspace(Cap_sel(seL4_CapInitThreadCNode), 32);
for (unsigned region = 0; region < bi.numDeviceRegions; region++) {
size_t const frame_size = 1UL << bi.deviceRegions[region].frameSizeBits;
for (uint64_t sel = bi.deviceRegions[region].frames.start,
phys_addr = bi.deviceRegions[region].basePaddr;
sel < bi.deviceRegions[region].frames.end;
sel++, phys_addr += frame_size) {
_io_mem_alloc.add_range(phys_addr, frame_size);
_unused_phys_alloc.remove_range(phys_addr, frame_size);
addr_t const dst_frame = phys_addr >> get_page_size_log2();
_phys_cnode.move(initial_cspace, Cnode_index(sel),
Cnode_index(dst_frame));
}
}
/* core's virtual memory */
_core_mem_alloc.virt_alloc()->add_range(_vm_base, _vm_size);
@ -207,8 +223,12 @@ void Platform::_switch_to_core_cspace()
for (unsigned sel = bi.untyped.start; sel < bi.untyped.end; sel++)
_core_cnode.move(initial_cspace, Cnode_index(sel));
// for (unsigned sel = bi.deviceUntyped.start; sel < bi.deviceUntyped.end; sel++)
// _core_cnode.copy(initial_cspace, sel);
/* move the device memory selectors to core's CNode */
for (unsigned region = 0; region < bi.numDeviceRegions; region++) {
for (unsigned sel = bi.deviceRegions[region].frames.start;
sel < bi.deviceRegions[region].frames.end; sel++)
_core_cnode.move(initial_cspace, Cnode_index(sel));
}
for (unsigned sel = bi.userImageFrames.start; sel < bi.userImageFrames.end; sel++)
_core_cnode.copy(initial_cspace, Cnode_index(sel));
@ -264,6 +284,9 @@ void Platform::_init_core_page_table_registry()
{
seL4_BootInfo const &bi = sel4_boot_info();
addr_t const modules_start = reinterpret_cast<addr_t>(&_boot_modules_binaries_begin);
addr_t const modules_end = reinterpret_cast<addr_t>(&_boot_modules_binaries_end);
/*
* Register initial page tables
*/
@ -282,6 +305,10 @@ void Platform::_init_core_page_table_registry()
virt_addr = (addr_t)(&_prog_img_beg);
for (unsigned sel = bi.userImageFrames.start; sel < bi.userImageFrames.end; sel++) {
/* skip boot modules */
if (modules_start <= virt_addr && virt_addr <= modules_end)
continue;
_core_page_table_registry.insert_page_table_entry(virt_addr, sel);
virt_addr += get_page_size();