2 * This file is part of the coreboot project.
4 * Copyright (C) 2010 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>
24 #include <device/device.h>
25 #include <device/pci.h>
26 #include <device/pci_ids.h>
27 #include <device/pci_ops.h>
28 #include <cpu/x86/msr.h>
29 #include <cpu/amd/mtrr.h>
30 #include <boot/coreboot_tables.h>
34 static u32 nb_read_index(device_t dev, u32 index_reg, u32 index)
36 pci_write_config32(dev, index_reg, index);
37 return pci_read_config32(dev, index_reg + 0x4);
40 static void nb_write_index(device_t dev, u32 index_reg, u32 index, u32 data)
42 pci_write_config32(dev, index_reg, index);
43 pci_write_config32(dev, index_reg + 0x4, data);
46 /* extension registers */
47 u32 pci_ext_read_config32(device_t nb_dev, device_t dev, u32 reg)
49 /*get BAR3 base address for nbcfg0x1c */
50 u32 addr = pci_read_config32(nb_dev, 0x1c) & ~0xF;
51 printk_debug("addr=%x,bus=%x,devfn=%x\n", addr, dev->bus->secondary,
53 addr |= dev->bus->secondary << 20 | /* bus num */
54 dev->path.pci.devfn << 12 | reg;
55 return *((u32 *) addr);
58 void pci_ext_write_config32(device_t nb_dev, device_t dev, u32 reg_pos, u32 mask, u32 val)
62 /*get BAR3 base address for nbcfg0x1c */
63 u32 addr = pci_read_config32(nb_dev, 0x1c) & ~0xF;
64 /*printk_debug("write: addr=%x,bus=%x,devfn=%x\n", addr, dev->bus->secondary,
65 dev->path.pci.devfn);*/
66 addr |= dev->bus->secondary << 20 | /* bus num */
67 dev->path.pci.devfn << 12 | reg_pos;
69 reg = reg_old = *((u32 *) addr);
73 *((u32 *) addr) = val;
77 u32 nbmisc_read_index(device_t nb_dev, u32 index)
79 return nb_read_index((nb_dev), NBMISC_INDEX, (index));
82 void nbmisc_write_index(device_t nb_dev, u32 index, u32 data)
84 nb_write_index((nb_dev), NBMISC_INDEX, ((index) | 0x80), (data));
87 u32 nbpcie_p_read_index(device_t dev, u32 index)
89 return nb_read_index((dev), NBPCIE_INDEX, (index));
92 void nbpcie_p_write_index(device_t dev, u32 index, u32 data)
94 nb_write_index((dev), NBPCIE_INDEX, (index), (data));
97 u32 nbpcie_ind_read_index(device_t nb_dev, u32 index)
99 return nb_read_index((nb_dev), NBPCIE_INDEX, (index));
102 void nbpcie_ind_write_index(device_t nb_dev, u32 index, u32 data)
104 nb_write_index((nb_dev), NBPCIE_INDEX, (index), (data));
107 u32 htiu_read_index(device_t nb_dev, u32 index)
109 return nb_read_index((nb_dev), NBHTIU_INDEX, (index));
112 void htiu_write_index(device_t nb_dev, u32 index, u32 data)
114 nb_write_index((nb_dev), NBHTIU_INDEX, ((index) | 0x100), (data));
117 u32 nbmc_read_index(device_t nb_dev, u32 index)
119 return nb_read_index((nb_dev), NBMC_INDEX, (index));
122 void nbmc_write_index(device_t nb_dev, u32 index, u32 data)
124 nb_write_index((nb_dev), NBMC_INDEX, ((index) | 1 << 9), (data));
127 void set_nbcfg_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val)
130 reg = reg_old = pci_read_config32(nb_dev, reg_pos);
133 if (reg != reg_old) {
134 pci_write_config32(nb_dev, reg_pos, reg);
138 void set_nbcfg_enable_bits_8(device_t nb_dev, u32 reg_pos, u8 mask, u8 val)
141 reg = reg_old = pci_read_config8(nb_dev, reg_pos);
144 if (reg != reg_old) {
145 pci_write_config8(nb_dev, reg_pos, reg);
149 void set_nbmc_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val)
152 reg = reg_old = nbmc_read_index(nb_dev, reg_pos);
155 if (reg != reg_old) {
156 nbmc_write_index(nb_dev, reg_pos, reg);
160 void set_htiu_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val)
163 reg = reg_old = htiu_read_index(nb_dev, reg_pos);
166 if (reg != reg_old) {
167 htiu_write_index(nb_dev, reg_pos, reg);
171 void set_nbmisc_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val)
174 reg = reg_old = nbmisc_read_index(nb_dev, reg_pos);
177 if (reg != reg_old) {
178 nbmisc_write_index(nb_dev, reg_pos, reg);
182 void set_pcie_enable_bits(device_t dev, u32 reg_pos, u32 mask, u32 val)
185 reg = reg_old = nb_read_index(dev, NBPCIE_INDEX, reg_pos);
188 if (reg != reg_old) {
189 nb_write_index(dev, NBPCIE_INDEX, reg_pos, reg);
193 /***********************************************************
194 * To access bar3 we need to program PCI MMIO 7 in K8.
196 * 1: enable/enter k8 temp mmio base
198 ***********************************************************/
199 void ProgK8TempMmioBase(u8 in_out, u32 pcie_base_add, u32 mmio_base_add)
201 /* K8 Function1 is address map */
202 device_t k8_f1 = dev_find_slot(0, PCI_DEVFN(0x18, 1));
205 pci_write_config32(k8_f1, 0xbc,
206 (((pcie_base_add + 0x10000000 -
207 1) >> 8) & 0xffffff00) | 0x8);
208 pci_write_config32(k8_f1, 0xb8, (pcie_base_add >> 8) | 0x3);
209 pci_write_config32(k8_f1, 0xb4,
210 ((mmio_base_add + 0x10000000 -
211 1) >> 8) & 0xffffff00);
212 pci_write_config32(k8_f1, 0xb0, (mmio_base_add >> 8) | 0x3);
214 pci_write_config32(k8_f1, 0xb8, 0);
215 pci_write_config32(k8_f1, 0xbc, 0);
216 pci_write_config32(k8_f1, 0xb0, 0);
217 pci_write_config32(k8_f1, 0xb4, 0);
221 void PcieReleasePortTraining(device_t nb_dev, device_t dev, u32 port)
224 case 2: /* GFX, bit4-5 */
226 set_nbmisc_enable_bits(nb_dev, PCIE_LINK_CFG,
227 1 << (port + 2), 0 << (port + 2));
229 case 4: /* GPPSB, bit20-24 */
233 set_nbmisc_enable_bits(nb_dev, PCIE_LINK_CFG,
234 1 << (port + 17), 0 << (port + 17));
236 case 9: /* GPP, bit 4,5 of miscind 0x2D */
238 set_nbmisc_enable_bits(nb_dev, 0x2D,
239 1 << (port - 5), 0 << (port - 5));
244 /********************************************************************************************************
246 * 0: no device is present.
247 * 1: device is present and is trained.
248 ********************************************************************************************************/
249 u8 PcieTrainPort(device_t nb_dev, device_t dev, u32 port)
252 u32 lc_state, reg, current_link_width, lane_mask;
253 int8_t current, res = 0;
255 void set_pcie_dereset();
256 void set_pcie_reset();
260 gfx_gpp_sb_sel = PCIE_CORE_INDEX_GFX;
263 gfx_gpp_sb_sel = PCIE_CORE_INDEX_GPPSB;
266 gfx_gpp_sb_sel = PCIE_CORE_INDEX_GPP;
273 lc_state = nbpcie_p_read_index(dev, 0xa5); /* lc_state */
274 printk_debug("PcieLinkTraining port=%x:lc current state=%x\n",
276 current = lc_state & 0x3f; /* get LC_CURRENT_STATE, bit0-5 */
279 case 0x00: /* 0x00-0x04 means no device is present */
288 /* read back current link width [6:4]. */
289 current_link_width = (nbpcie_p_read_index(dev, 0xA2) >> 4) & 0x7;
290 /* 4 means 7:4 and 15:12
291 * 3 means 7:2 and 15:10
292 * 2 means 7:1 and 15:9
293 * egnoring the reversal case
295 lane_mask = (0xFF << (current_link_width - 2) * 2) & 0xFF;
296 reg = nbpcie_ind_read_index(nb_dev, 0x65 | gfx_gpp_sb_sel);
297 reg |= lane_mask << 8 | lane_mask;
298 reg = 0xE0E0; /* TODO: See the comments in rs780_pcie.c, at about line 145. */
299 nbpcie_ind_write_index(nb_dev, 0x65 | gfx_gpp_sb_sel, reg);
300 printk_debug("link_width=%x, lane_mask=%x",
301 current_link_width, lane_mask);
306 case 0x07: /* device is in compliance state (training sequence is done). Move to train the next device */
312 pci_ext_read_config32(nb_dev, dev,
313 PCIE_VC0_RESOURCE_STATUS);
314 printk_debug("PcieTrainPort reg=0x%x\n", reg);
316 if (reg & VC_NEGOTIATION_PENDING) { /* bit1=1 means the link needs to be re-trained. */
317 /* set bit8=1, bit0-2=bit4-6 */
320 nbpcie_p_read_index(dev,
322 tmp = (reg >> 4) && 0x3; /* get bit4-6 */
323 reg &= 0xfff8; /* clear bit0-2 */
324 reg += tmp; /* merge */
326 count++; /* CIM said "keep in loop"? */
332 default: /* reset pcie */
334 count = 0; /* break loop */
342 * Compliant with CIM_33's ATINB_SetToms.
343 * Set Top Of Memory below and above 4G.
345 void rs780_set_tom(device_t nb_dev)
347 extern uint64_t uma_memory_base;
350 pci_write_config32(nb_dev, 0x90, uma_memory_base);
351 //nbmc_write_index(nb_dev, 0x1e, uma_memory_base);