2 * This file is part of the coreboot project.
4 * Copyright (C) 2011 Advanced Micro Devices, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <console/console.h>
21 #include <device/device.h>
22 #include <device/pci.h>
24 #include <boot/tables.h>
25 #include <cpu/x86/msr.h>
26 #include <cpu/amd/mtrr.h>
27 #include <device/pci_def.h>
28 //#include <southbridge/amd/sb900/sb900.h>
31 #define ONE_MB 0x100000
32 //#define SMBUS_IO_BASE 0x6000
38 void set_pcie_reset(void)
44 * mainboard specific SB CIMx callback
46 void set_pcie_dereset(void)
50 uint64_t uma_memory_base, uma_memory_size;
52 /*************************************************
53 * enable the dedicated function in torpedo board.
54 *************************************************/
55 static void torpedo_enable(device_t dev)
57 printk(BIOS_INFO, "Mainboard Torpedo Enable. dev=0x%p\n", dev);
58 #if (CONFIG_GFXUMA == 1)
62 /* TOP_MEM: the top of DRAM below 4G */
65 (BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
66 __func__, msr.lo, msr.hi);
68 /* TOP_MEM2: the top of DRAM above 4G */
69 msr2 = rdmsr(TOP_MEM2);
71 (BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
72 __func__, msr2.lo, msr2.hi);
74 /* refer to UMA Size Consideration in Family12h BKDG. */
75 /* Please reference MemNGetUmaSizeLN () */
77 * Total system memory UMASize
83 sys_mem = msr.lo + 16 * ONE_MB; // Ignore 16MB allocated for C6 when finding UMA size
84 if (sys_mem >= 2048 * ONE_MB) {
85 uma_memory_size = 512 * ONE_MB;
86 } else if (sys_mem >= 1024 * ONE_MB) {
87 uma_memory_size = 256 * ONE_MB;
89 uma_memory_size = 64 * ONE_MB;
91 uma_memory_base = msr.lo - uma_memory_size; /* TOP_MEM1 */
92 printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
93 __func__, uma_memory_size, uma_memory_base);
97 uma_memory_size = 0x10000000; /* 256M recommended UMA */
98 uma_memory_base = 0x30000000; /* 1GB system memory supported */
103 int add_mainboard_resources(struct lb_memory *mem)
105 /* UMA is removed from system memory in the northbridge code, but
106 * in some circumstances we want the memory mentioned as reserved.
108 #if (CONFIG_GFXUMA == 1)
109 printk(BIOS_INFO, "uma_memory_start=0x%llx, uma_memory_size=0x%llx \n",
110 uma_memory_base, uma_memory_size);
111 lb_add_memory_range(mem, LB_MEM_RESERVED, uma_memory_base,
116 struct chip_operations mainboard_ops = {
117 CHIP_NAME("AMD TORPEDO Mainboard")
118 .enable_dev = torpedo_enable,