sel4: initialization of core's allocators

repos/base-sel4/src/core/platform.cc

@@ -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
 	 */