xnu-4570.1.46.tar.gz

[apple/xnu.git] / osfmk / arm / lowmem_vectors.c

diff --git a/osfmk/arm/lowmem_vectors.c b/osfmk/arm/lowmem_vectors.c
new file mode 100644 (file)
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+++ b/osfmk/arm/lowmem_vectors.c
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+/*
+ * Copyright (c) 2012-2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <mach_kdp.h>
+#include <mach/vm_param.h>
+#include <arm/lowglobals.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+
+extern vm_offset_t vm_kernel_stext;
+extern void    *version;
+extern void    *kmod;
+extern void    *kdp_trans_off;
+extern void    *osversion;
+extern void    *flag_kdp_trigger_reboot;
+extern void    *manual_pkt;
+extern struct vm_object pmap_object_store;     /* store pt pages */
+
+lowglo lowGlo __attribute__ ((aligned(PAGE_MAX_SIZE))) = {
+       .lgVerCode = { 'O','c','t','o','p','u','s',' ' },
+       // Increment the major version for changes that break the current Astris
+       // usage of lowGlo values
+       // Increment the minor version for changes that provide additonal info/function
+       // but does not break current usage
+       .lgLayoutMajorVersion = 3,
+       .lgLayoutMinorVersion = 0,
+       .lgLayoutMagic = LOWGLO_LAYOUT_MAGIC,
+       .lgVersion = (uint32_t)&version,
+       .lgKmodptr = (uint32_t)&kmod,
+       .lgPageShift = PAGE_SHIFT,
+#if MACH_KDP
+       .lgTransOff = (uint32_t)&kdp_trans_off,
+#endif
+       .lgOSVersion = (uint32_t)&osversion,
+#if MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING
+       .lgRebootFlag   = (uint32_t)&flag_kdp_trigger_reboot,
+       .lgManualPktAddr = (uint32_t)&manual_pkt,
+#endif
+       .lgPmapMemQ = (uint32_t)&(pmap_object_store.memq),
+       .lgPmapMemPageOffset = offsetof(struct vm_page_with_ppnum, phys_page),
+       .lgPmapMemChainOffset = offsetof(struct vm_page, listq),
+       .lgPmapMemPagesize = (uint32_t)sizeof(struct vm_page),
+
+       .lgPmapMemStartAddr = -1,
+       .lgPmapMemEndAddr = -1,
+       .lgPmapMemFirstppnum = -1
+};
+
+void patch_low_glo(void)
+{
+       lowGlo.lgStext = (uint32_t)vm_kernel_stext;
+}
+
+void patch_low_glo_static_region(uint32_t address, uint32_t size)
+{
+       lowGlo.lgStaticAddr = address;
+       lowGlo.lgStaticSize = size;
+}
+
+
+void patch_low_glo_vm_page_info(void * start_addr, void * end_addr, uint32_t first_ppnum)
+{
+       lowGlo.lgPmapMemStartAddr = (uint32_t)start_addr;
+       lowGlo.lgPmapMemEndAddr = (uint32_t)end_addr;
+       lowGlo.lgPmapMemFirstppnum = first_ppnum;
+}