Rename devices -> device

to match src/include/device

Change-Id: I5d0e5b4361c34881a3b81347aac48738cb5b9af0
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1960
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>

1 files changed, 490 insertions, 0 deletions

diff --git a/src/device/oprom/realmode/x86.c b/src/device/oprom/realmode/x86.c
new file mode 100644
index 0000000000..6a82a691b5
--- /dev/null
+++ b/src/device/oprom/realmode/x86.c
@@ -0,0 +1,490 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ * Copyright (C) 2009-2010 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <device/pci.h>
+#include <string.h>
+
+#include <arch/io.h>
+#include <arch/registers.h>
+#include <console/console.h>
+#include <arch/interrupt.h>
+#include <cbfs.h>
+#include <delay.h>
+#include <pc80/i8259.h>
+#include "x86.h"
+#include "vbe.h"
+#include <lib/jpeg.h>
+/* we use x86emu's register file representation */
+#include <x86emu/regs.h>
+
+/* to have a common register file for interrupt handlers */
+X86EMU_sysEnv _X86EMU_env;
+
+void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx,
+		u32 esi, u32 edi) __attribute__((regparm(0))) =
+						(void *)&__realmode_call;
+
+void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx, u32 edx,
+		u32 esi, u32 edi) __attribute__((regparm(0))) =
+						(void *)&__realmode_interrupt;
+
+static void setup_rombios(void)
+{
+	const char date[] = "06/11/99";
+	memcpy((void *)0xffff5, &date, 8);
+
+	const char ident[] = "PCI_ISA";
+	memcpy((void *)0xfffd9, &ident, 7);
+
+	/* system model: IBM-AT */
+	write8(0xffffe, 0xfc);
+}
+
+static int (*intXX_handler[256])(void) = { NULL };
+
+static int intXX_exception_handler(void)
+{
+	/* compatibility shim */
+	struct eregs reg_info = {
+		.eax=X86_EAX,
+		.ecx=X86_ECX,
+		.edx=X86_EDX,
+		.ebx=X86_EBX,
+		.esp=X86_ESP,
+		.ebp=X86_EBP,
+		.esi=X86_ESI,
+		.edi=X86_EDI,
+		.vector=M.x86.intno,
+		.error_code=0, // FIXME: fill in
+		.eip=X86_EIP,
+		.cs=X86_CS,
+		.eflags=X86_EFLAGS
+	};
+	struct eregs *regs = &reg_info;
+
+	printk(BIOS_INFO, "Oops, exception %d while executing option rom\n",
+			regs->vector);
+	x86_exception(regs);	// Call coreboot exception handler
+
+	return 0;		// Never really returns
+}
+
+static int intXX_unknown_handler(void)
+{
+	printk(BIOS_INFO, "Unsupported software interrupt #0x%x eax 0x%x\n",
+			M.x86.intno, X86_EAX);
+
+	return -1;
+}
+
+/* setup interrupt handlers for mainboard */
+void mainboard_interrupt_handlers(int intXX, void *intXX_func)
+{
+	intXX_handler[intXX] = intXX_func;
+}
+
+static void setup_interrupt_handlers(void)
+{
+	int i;
+
+	/* The first 16 intXX functions are not BIOS services,
+	 * but the CPU-generated exceptions ("hardware interrupts")
+	 */
+	for (i = 0; i < 0x10; i++)
+		intXX_handler[i] = &intXX_exception_handler;
+
+	/* Mark all other intXX calls as unknown first */
+	for (i = 0x10; i < 0x100; i++)
+	{
+		/* If the mainboard_interrupt_handler isn't called first.
+		 */
+		if(!intXX_handler[i])
+		{
+			/* Now set the default functions that are actually
+			 * needed to initialize the option roms. This is
+			 * very slick, as it allows us to implement mainboard
+			 * specific interrupt handlers, such as the int15.
+			 */
+			switch (i) {
+			case 0x10:
+				intXX_handler[0x10] = &int10_handler;
+				break;
+			case 0x12:
+				intXX_handler[0x12] = &int12_handler;
+				break;
+			case 0x16:
+				intXX_handler[0x16] = &int16_handler;
+				break;
+			case 0x1a:
+				intXX_handler[0x1a] = &int1a_handler;
+				break;
+			default:
+				intXX_handler[i] = &intXX_unknown_handler;
+				break;
+			}
+		}
+	}
+}
+
+static void write_idt_stub(void *target, u8 intnum)
+{
+	unsigned char *codeptr;
+	codeptr = (unsigned char *) target;
+	memcpy(codeptr, &__idt_handler, (size_t)&__idt_handler_size);
+	codeptr[3] = intnum; /* modify int# in the code stub. */
+}
+
+static void setup_realmode_idt(void)
+{
+	struct realmode_idt *idts = (struct realmode_idt *) 0;
+	int i;
+
+	/* Copy IDT stub code for each interrupt. This might seem wasteful
+	 * but it is really simple
+	 */
+	 for (i = 0; i < 256; i++) {
+		idts[i].cs = 0;
+		idts[i].offset = 0x1000 + (i * (u32)&__idt_handler_size);
+		write_idt_stub((void *)((u32 )idts[i].offset), i);
+	}
+
+	/* Many option ROMs use the hard coded interrupt entry points in the
+	 * system bios. So install them at the known locations.
+	 */
+
+	/* int42 is the relocated int10 */
+	write_idt_stub((void *)0xff065, 0x42);
+	/* BIOS Int 11 Handler F000:F84D */
+	write_idt_stub((void *)0xff84d, 0x11);
+	/* BIOS Int 12 Handler F000:F841 */
+	write_idt_stub((void *)0xff841, 0x12);
+	/* BIOS Int 13 Handler F000:EC59 */
+	write_idt_stub((void *)0xfec59, 0x13);
+	/* BIOS Int 14 Handler F000:E739 */
+	write_idt_stub((void *)0xfe739, 0x14);
+	/* BIOS Int 15 Handler F000:F859 */
+	write_idt_stub((void *)0xff859, 0x15);
+	/* BIOS Int 16 Handler F000:E82E */
+	write_idt_stub((void *)0xfe82e, 0x16);
+	/* BIOS Int 17 Handler F000:EFD2 */
+	write_idt_stub((void *)0xfefd2, 0x17);
+	/* ROM BIOS Int 1A Handler F000:FE6E */
+	write_idt_stub((void *)0xffe6e, 0x1a);
+}
+
+#if CONFIG_FRAMEBUFFER_SET_VESA_MODE
+vbe_mode_info_t mode_info;
+static int mode_info_valid;
+
+int vbe_mode_info_valid(void)
+{
+	return mode_info_valid;
+}
+
+static u8 vbe_get_mode_info(vbe_mode_info_t * mi)
+{
+	printk(BIOS_DEBUG, "VBE: Getting information about VESA mode %04x\n",
+		mi->video_mode);
+	char *buffer = (char *)&__buffer;
+	u16 buffer_seg = (((unsigned long)buffer) >> 4) & 0xff00;
+	u16 buffer_adr = ((unsigned long)buffer) & 0xffff;
+	realmode_interrupt(0x10, VESA_GET_MODE_INFO, 0x0000,
+			mi->video_mode, 0x0000, buffer_seg, buffer_adr);
+	memcpy(mi->mode_info_block, buffer, sizeof(vbe_mode_info_t));
+	mode_info_valid = 1;
+	return 0;
+}
+
+static u8 vbe_set_mode(vbe_mode_info_t * mi)
+{
+	printk(BIOS_DEBUG, "VBE: Setting VESA mode %04x\n", mi->video_mode);
+	// request linear framebuffer mode
+	mi->video_mode |= (1 << 14);
+	// request clearing of framebuffer
+	mi->video_mode &= ~(1 << 15);
+	realmode_interrupt(0x10, VESA_SET_MODE, mi->video_mode,
+			0x0000, 0x0000, 0x0000, 0x0000);
+	return 0;
+}
+
+/* These two functions could probably even be generic between
+ * yabel and x86 native. TBD later.
+ */
+void vbe_set_graphics(void)
+{
+	mode_info.video_mode = (1 << 14) | CONFIG_FRAMEBUFFER_VESA_MODE;
+	vbe_get_mode_info(&mode_info);
+	unsigned char *framebuffer =
+		(unsigned char *)mode_info.vesa.phys_base_ptr;
+	printk(BIOS_DEBUG, "VBE: resolution:  %dx%d@%d\n",
+		le16_to_cpu(mode_info.vesa.x_resolution),
+		le16_to_cpu(mode_info.vesa.y_resolution),
+		mode_info.vesa.bits_per_pixel);
+	printk(BIOS_DEBUG, "VBE: framebuffer: %p\n", framebuffer);
+	if (!framebuffer) {
+		printk(BIOS_DEBUG, "VBE: Mode does not support linear "
+			"framebuffer\n");
+		return;
+	}
+
+	vbe_set_mode(&mode_info);
+#if CONFIG_BOOTSPLASH
+	struct jpeg_decdata *decdata;
+	decdata = malloc(sizeof(*decdata));
+	unsigned char *jpeg = cbfs_find_file("bootsplash.jpg",
+						CBFS_TYPE_BOOTSPLASH);
+	if (!jpeg) {
+		printk(BIOS_DEBUG, "VBE: No bootsplash found.\n");
+		return;
+	}
+	int ret = 0;
+	ret = jpeg_decode(jpeg, framebuffer, 1024, 768, 16, decdata);
+#endif
+}
+
+void vbe_textmode_console(void)
+{
+	delay(2);
+	realmode_interrupt(0x10, 0x0003, 0x0000, 0x0000,
+				0x0000, 0x0000, 0x0000);
+}
+
+void fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
+{
+	framebuffer->physical_address = mode_info.vesa.phys_base_ptr;
+
+	framebuffer->x_resolution = le16_to_cpu(mode_info.vesa.x_resolution);
+	framebuffer->y_resolution = le16_to_cpu(mode_info.vesa.y_resolution);
+	framebuffer->bytes_per_line =
+				le16_to_cpu(mode_info.vesa.bytes_per_scanline);
+	framebuffer->bits_per_pixel = mode_info.vesa.bits_per_pixel;
+
+	framebuffer->red_mask_pos = mode_info.vesa.red_mask_pos;
+	framebuffer->red_mask_size = mode_info.vesa.red_mask_size;
+
+	framebuffer->green_mask_pos = mode_info.vesa.green_mask_pos;
+	framebuffer->green_mask_size = mode_info.vesa.green_mask_size;
+
+	framebuffer->blue_mask_pos = mode_info.vesa.blue_mask_pos;
+	framebuffer->blue_mask_size = mode_info.vesa.blue_mask_size;
+
+	framebuffer->reserved_mask_pos = mode_info.vesa.reserved_mask_pos;
+	framebuffer->reserved_mask_size = mode_info.vesa.reserved_mask_size;
+}
+#endif
+
+void run_bios(struct device *dev, unsigned long addr)
+{
+	u32 num_dev = (dev->bus->secondary << 8) | dev->path.pci.devfn;
+
+	/* Setting up required hardware.
+	 * Removing this will cause random illegal instruction exceptions
+	 * in some option roms.
+	 */
+	setup_i8259();
+
+	/* Set up some legacy information in the F segment */
+	setup_rombios();
+
+	/* Set up C interrupt handlers */
+	setup_interrupt_handlers();
+
+	/* Set up real-mode IDT */
+	setup_realmode_idt();
+
+	memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
+	printk(BIOS_SPEW, "Real mode stub @%p: %d bytes\n", REALMODE_BASE,
+			(u32)&__realmode_code_size);
+
+	printk(BIOS_DEBUG, "Calling Option ROM...\n");
+	/* TODO ES:DI Pointer to System BIOS PnP Installation Check Structure */
+	/* Option ROM entry point is at OPROM start + 3 */
+	realmode_call(addr + 0x0003, num_dev, 0xffff, 0x0000, 0xffff, 0x0, 0x0);
+	printk(BIOS_DEBUG, "... Option ROM returned.\n");
+
+#if CONFIG_FRAMEBUFFER_SET_VESA_MODE
+	vbe_set_graphics();
+#endif
+}
+
+#if CONFIG_GEODE_VSA
+#include <cpu/amd/lxdef.h>
+#include <cpu/amd/vr.h>
+#include <cbfs.h>
+
+#define VSA2_BUFFER		0x60000
+#define VSA2_ENTRY_POINT	0x60020
+
+// TODO move to a header file.
+void do_vsmbios(void);
+
+/* VSA virtual register helper */
+static u32 VSA_vrRead(u16 classIndex)
+{
+	u32 eax, ebx, ecx, edx;
+	asm volatile (
+		"movw	$0x0AC1C, %%dx\n"
+		"orl	$0x0FC530000, %%eax\n"
+		"outl	%%eax, %%dx\n"
+		"addb	$2, %%dl\n"
+		"inw	%%dx, %%ax\n"
+		: "=a" (eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
+		: "a"(classIndex)
+	);
+
+	return eax;
+}
+
+void do_vsmbios(void)
+{
+	printk(BIOS_DEBUG, "Preparing for VSA...\n");
+
+	/* Set up C interrupt handlers */
+	setup_interrupt_handlers();
+
+	/* Setting up realmode IDT */
+	setup_realmode_idt();
+
+	memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
+	printk(BIOS_SPEW, "VSA: Real mode stub @%p: %d bytes\n", REALMODE_BASE,
+			(u32)&__realmode_code_size);
+
+	if ((unsigned int)cbfs_load_stage("vsa") != VSA2_ENTRY_POINT) {
+		printk(BIOS_ERR, "Failed to load VSA.\n");
+		return;
+	}
+
+	unsigned char *buf = (unsigned char *)VSA2_BUFFER;
+	printk(BIOS_DEBUG, "VSA: Buffer @%p *[0k]=%02x\n", buf, buf[0]);
+	printk(BIOS_DEBUG, "VSA: Signature *[0x20-0x23] is %02x:%02x:%02x:%02x\n",
+		     buf[0x20], buf[0x21], buf[0x22], buf[0x23]);
+
+	/* Check for code to emit POST code at start of VSA. */
+	if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) ||
+	    (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) {
+		printk(BIOS_WARNING, "VSA: Signature incorrect. Install failed.\n");
+		return;
+	}
+
+	printk(BIOS_DEBUG, "Calling VSA module...\n");
+
+	/* ECX gets SMM, EDX gets SYSMEM */
+	realmode_call(VSA2_ENTRY_POINT, 0x0, 0x0, MSR_GLIU0_SMM,
+			MSR_GLIU0_SYSMEM, 0x0, 0x0);
+
+	printk(BIOS_DEBUG, "... VSA module returned.\n");
+
+	/* Restart timer 1 */
+	outb(0x56, 0x43);
+	outb(0x12, 0x41);
+
+	/* Check that VSA is running OK */
+	if (VSA_vrRead(SIGNATURE) == VSA2_SIGNATURE)
+		printk(BIOS_DEBUG, "VSM: VSA2 VR signature verified.\n");
+	else
+		printk(BIOS_ERR, "VSM: VSA2 VR signature not valid. Install failed.\n");
+}
+#endif
+
+/* interrupt_handler() is called from assembler code only,
+ * so there is no use in putting the prototype into a header file.
+ */
+int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
+	    u32 gsfs, u32 dses,
+	    u32 edi, u32 esi,
+	    u32 ebp, u32 esp,
+	    u32 ebx, u32 edx,
+	    u32 ecx, u32 eax,
+	    u32 cs_ip, u16 stackflags);
+
+int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
+	    u32 gsfs, u32 dses,
+	    u32 edi, u32 esi,
+	    u32 ebp, u32 esp,
+	    u32 ebx, u32 edx,
+	    u32 ecx, u32 eax,
+	    u32 cs_ip, u16 stackflags)
+{
+	u32 ip;
+	u32 cs;
+	u32 flags;
+	int ret = 0;
+
+	ip = cs_ip & 0xffff;
+	cs = cs_ip >> 16;
+	flags = stackflags;
+
+#if CONFIG_REALMODE_DEBUG
+	printk(BIOS_DEBUG, "oprom: INT# 0x%x\n", intnumber);
+	printk(BIOS_DEBUG, "oprom: eax: %08x ebx: %08x ecx: %08x edx: %08x\n",
+		      eax, ebx, ecx, edx);
+	printk(BIOS_DEBUG, "oprom: ebp: %08x esp: %08x edi: %08x esi: %08x\n",
+		     ebp, esp, edi, esi);
+	printk(BIOS_DEBUG, "oprom:  ip: %04x      cs: %04x   flags: %08x\n",
+		     ip, cs, flags);
+#endif
+
+	// Fetch arguments from the stack and put them to a place
+	// suitable for the interrupt handlers
+	X86_EAX = eax;
+	X86_ECX = ecx;
+	X86_EDX = edx;
+	X86_EBX = ebx;
+	X86_ESP = esp;
+	X86_EBP = ebp;
+	X86_ESI = esi;
+	X86_EDI = edi;
+	M.x86.intno = intnumber;
+	/* TODO: error_code must be stored somewhere */
+	X86_EIP = ip;
+	X86_CS = cs;
+	X86_EFLAGS = flags;
+
+	// Call the interrupt handler for this int#
+	ret = intXX_handler[intnumber]();
+
+	// Put registers back on the stack. The assembler code
+	// will later pop them.
+	// What happens here is that we force (volatile!) changing
+	// the values of the parameters of this function. We do this
+	// because we know that they stay alive on the stack after
+	// we leave this function. Don't say this is bollocks.
+	*(volatile u32 *)&eax = X86_EAX;
+	*(volatile u32 *)&ecx = X86_ECX;
+	*(volatile u32 *)&edx = X86_EDX;
+	*(volatile u32 *)&ebx = X86_EBX;
+	*(volatile u32 *)&esi = X86_ESI;
+	*(volatile u32 *)&edi = X86_EDI;
+	flags = X86_EFLAGS;
+
+	/* Pass success or error back to our caller via the CARRY flag */
+	if (ret) {
+		flags &= ~1; // no error: clear carry
+	}else{
+		printk(BIOS_DEBUG,"int%02x call returned error.\n", intnumber);
+		flags |= 1;  // error: set carry
+	}
+	*(volatile u16 *)&stackflags = flags;
+
+	/* The assembler code doesn't actually care for the return value,
+	 * but keep it around so its expectations are met */
+	return ret;
+}
+