WebSVN – HelenOS-historic – Blame – /kernel/trunk/genarch/src/acpi/madt.c

Rev	Author	Line No.	Line
33	jermar	1	/*
		2	* Copyright (C) 2005 Jakub Jermar
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
34	jermar	29	#include <arch/types.h>
33	jermar	30	#include <arch/acpi/acpi.h>
		31	#include <arch/acpi/madt.h>
34	jermar	32	#include <arch/smp/apic.h>
127	jermar	33	#include <mm/page.h>
		34	#include <panic.h>
33	jermar	35
		36	struct acpi_madt *acpi_madt = NULL;
34	jermar	37
		38	#ifdef __SMP__
		39
127	jermar	40	/*
		41	* NOTE: it is currently not completely clear to the authors of SPARTAN whether
		42	* MADT can exist in such a form that entries of the same type are not consecutive.
		43	* Because of this uncertainity, some entry types are explicitly checked for
		44	* being consecutive with other entries of the same kind.
		45	*/
		46
		47	static void madt_l_apic_entry(struct madt_l_apic *la, __u8 prev_type);
		48	static void madt_io_apic_entry(struct madt_io_apic *ioa, __u8 prev_type);
		49
		50	struct madt_l_apic *madt_l_apic_entries = NULL;
		51	struct madt_io_apic *madt_io_apic_entries = NULL;
		52
		53	int madt_l_apic_entry_cnt = 0;
		54	int madt_io_apic_entry_cnt = 0;
		55
34	jermar	56	char *entry[] = {
		57	"L_APIC",
		58	"IO_APIC",
		59	"INTR_SRC_OVRD",
		60	"NMI_SRC",
		61	"L_APIC_NMI",
		62	"L_APIC_ADDR_OVRD",
		63	"IO_SAPIC",
		64	"L_SAPIC",
		65	"PLATFORM_INTR_SRC"
		66	};
		67
		68	void acpi_madt_parse(void)
		69	{
		70	struct madt_apic_header end = (struct madt_apic_header ) (((__u8 *) acpi_madt) + acpi_madt->header.length);
		71	struct madt_apic_header *h = &acpi_madt->apic_header[0];
127	jermar	72	__u8 prev_type = 0; /* used to detect incosecutive entries */
34	jermar	73
127	jermar	74
34	jermar	75	l_apic = (__u32 *) acpi_madt->l_apic_address;
		76
		77	while (h < end) {
		78	switch (h->type) {
		79	case MADT_L_APIC:
127	jermar	80	madt_l_apic_entry((struct madt_l_apic *) h, prev_type);
		81	break;
34	jermar	82	case MADT_IO_APIC:
127	jermar	83	madt_io_apic_entry((struct madt_io_apic *) h, prev_type);
		84	break;
34	jermar	85	case MADT_INTR_SRC_OVRD:
		86	case MADT_NMI_SRC:
		87	case MADT_L_APIC_NMI:
		88	case MADT_L_APIC_ADDR_OVRD:
		89	case MADT_IO_SAPIC:
		90	case MADT_L_SAPIC:
		91	case MADT_PLATFORM_INTR_SRC:
		92	printf("MADT: skipping %s entry (type=%d)\n", entry[h->type], h->type);
		93	break;
		94
		95	default:
		96	if (h->type >= MADT_RESERVED_SKIP_BEGIN && h->type <= MADT_RESERVED_SKIP_END) {
		97	printf("MADT: skipping reserved entry (type=%d)\n", h->type);
		98	}
		99	if (h->type >= MADT_RESERVED_OEM_BEGIN) {
		100	printf("MADT: skipping OEM entry (type=%d)\n", h->type);
		101	}
		102	break;
		103	}
127	jermar	104	prev_type = h->type;
34	jermar	105	h = (struct madt_apic_header ) (((__u8 ) h) + h->length);
		106	}
		107
		108	}
127	jermar	109
		110	void madt_l_apic_entry(struct madt_l_apic *la, __u8 prev_type)
		111	{
		112	/* check for consecutiveness */
		113	if (madt_l_apic_entry_cnt && prev_type != MADT_L_APIC)
		114	panic("%s entries are not consecuitve\n", entry[MADT_L_APIC]);
34	jermar	115
127	jermar	116	if (!madt_l_apic_entry_cnt++)
		117	madt_l_apic_entries = la;
		118
		119	if (!(la->flags & 0x1)) {
		120	/* Processor is unusable, skip it. */
		121	return;
		122	}
		123
		124	apic_id_mask \|= 1<<la->apic_id;
		125	}
		126
		127	void madt_io_apic_entry(struct madt_io_apic *ioa, __u8 prev_type)
		128	{
		129	/* check for consecutiveness */
		130	if (madt_io_apic_entry_cnt && prev_type != MADT_IO_APIC)
		131	panic("%s entries are not consecuitve\n", entry[MADT_IO_APIC]);
		132
		133	if (!madt_io_apic_entry_cnt++) {
		134	madt_io_apic_entries = ioa;
		135	io_apic = (__u32 *) ioa->io_apic_address;
		136	map_page_to_frame((__address) io_apic, (__address) io_apic, PAGE_NOT_CACHEABLE, 0);
		137	}
		138	else {
		139	/* currently not supported */
		140	return;
		141	}
		142	}
		143
		144
34	jermar	145	#endif /* __SMP__ */

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(root)/kernel/trunk/genarch/src/acpi/madt.c @ 1780 – Rev 127