| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2010 Advanced Micro Devices, Inc. |
| * |
| * 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 <console/console.h> |
| |
| #include <arch/io.h> |
| |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/amd/mtrr.h> |
| #include <delay.h> |
| #include <cpu/cpu.h> |
| #include "rs780.h" |
| |
| static u32 nb_read_index(device_t dev, u32 index_reg, u32 index) |
| { |
| pci_write_config32(dev, index_reg, index); |
| return pci_read_config32(dev, index_reg + 0x4); |
| } |
| |
| static void nb_write_index(device_t dev, u32 index_reg, u32 index, u32 data) |
| { |
| pci_write_config32(dev, index_reg, index); |
| pci_write_config32(dev, index_reg + 0x4, data); |
| } |
| |
| /* extension registers */ |
| u32 pci_ext_read_config32(device_t nb_dev, device_t dev, u32 reg) |
| { |
| /*get BAR3 base address for nbcfg0x1c */ |
| u32 addr = pci_read_config32(nb_dev, 0x1c) & ~0xF; |
| printk(BIOS_DEBUG, "addr=%x,bus=%x,devfn=%x\n", addr, dev->bus->secondary, |
| dev->path.pci.devfn); |
| addr |= dev->bus->secondary << 20 | /* bus num */ |
| dev->path.pci.devfn << 12 | reg; |
| return *((u32 *) addr); |
| } |
| |
| void pci_ext_write_config32(device_t nb_dev, device_t dev, u32 reg_pos, u32 mask, u32 val) |
| { |
| u32 reg_old, reg; |
| |
| /*get BAR3 base address for nbcfg0x1c */ |
| u32 addr = pci_read_config32(nb_dev, 0x1c) & ~0xF; |
| /*printk(BIOS_DEBUG, "write: addr=%x,bus=%x,devfn=%x\n", addr, dev->bus->secondary, |
| dev->path.pci.devfn);*/ |
| addr |= dev->bus->secondary << 20 | /* bus num */ |
| dev->path.pci.devfn << 12 | reg_pos; |
| |
| reg = reg_old = *((u32 *) addr); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| *((u32 *) addr) = reg; |
| } |
| } |
| |
| u32 nbmisc_read_index(device_t nb_dev, u32 index) |
| { |
| return nb_read_index((nb_dev), NBMISC_INDEX, (index)); |
| } |
| |
| void nbmisc_write_index(device_t nb_dev, u32 index, u32 data) |
| { |
| nb_write_index((nb_dev), NBMISC_INDEX, ((index) | 0x80), (data)); |
| } |
| |
| u32 nbpcie_p_read_index(device_t dev, u32 index) |
| { |
| return nb_read_index((dev), NBPCIE_INDEX, (index)); |
| } |
| |
| void nbpcie_p_write_index(device_t dev, u32 index, u32 data) |
| { |
| nb_write_index((dev), NBPCIE_INDEX, (index), (data)); |
| } |
| |
| u32 nbpcie_ind_read_index(device_t nb_dev, u32 index) |
| { |
| return nb_read_index((nb_dev), NBPCIE_INDEX, (index)); |
| } |
| |
| void nbpcie_ind_write_index(device_t nb_dev, u32 index, u32 data) |
| { |
| nb_write_index((nb_dev), NBPCIE_INDEX, (index), (data)); |
| } |
| |
| u32 htiu_read_index(device_t nb_dev, u32 index) |
| { |
| return nb_read_index((nb_dev), NBHTIU_INDEX, (index)); |
| } |
| |
| void htiu_write_index(device_t nb_dev, u32 index, u32 data) |
| { |
| nb_write_index((nb_dev), NBHTIU_INDEX, ((index) | 0x100), (data)); |
| } |
| |
| u32 nbmc_read_index(device_t nb_dev, u32 index) |
| { |
| return nb_read_index((nb_dev), NBMC_INDEX, (index)); |
| } |
| |
| void nbmc_write_index(device_t nb_dev, u32 index, u32 data) |
| { |
| nb_write_index((nb_dev), NBMC_INDEX, ((index) | 1 << 9), (data)); |
| } |
| |
| void set_nbcfg_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val) |
| { |
| u32 reg_old, reg; |
| reg = reg_old = pci_read_config32(nb_dev, reg_pos); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| pci_write_config32(nb_dev, reg_pos, reg); |
| } |
| } |
| |
| void set_nbcfg_enable_bits_8(device_t nb_dev, u32 reg_pos, u8 mask, u8 val) |
| { |
| u8 reg_old, reg; |
| reg = reg_old = pci_read_config8(nb_dev, reg_pos); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| pci_write_config8(nb_dev, reg_pos, reg); |
| } |
| } |
| |
| void set_nbmc_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val) |
| { |
| u32 reg_old, reg; |
| reg = reg_old = nbmc_read_index(nb_dev, reg_pos); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| nbmc_write_index(nb_dev, reg_pos, reg); |
| } |
| } |
| |
| void set_htiu_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val) |
| { |
| u32 reg_old, reg; |
| reg = reg_old = htiu_read_index(nb_dev, reg_pos); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| htiu_write_index(nb_dev, reg_pos, reg); |
| } |
| } |
| |
| void set_nbmisc_enable_bits(device_t nb_dev, u32 reg_pos, u32 mask, u32 val) |
| { |
| u32 reg_old, reg; |
| reg = reg_old = nbmisc_read_index(nb_dev, reg_pos); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| nbmisc_write_index(nb_dev, reg_pos, reg); |
| } |
| } |
| |
| void set_pcie_enable_bits(device_t dev, u32 reg_pos, u32 mask, u32 val) |
| { |
| u32 reg_old, reg; |
| reg = reg_old = nb_read_index(dev, NBPCIE_INDEX, reg_pos); |
| reg &= ~mask; |
| reg |= val; |
| if (reg != reg_old) { |
| nb_write_index(dev, NBPCIE_INDEX, reg_pos, reg); |
| } |
| } |
| |
| /*********************************************************** |
| * To access bar3 we need to program PCI MMIO 7 in K8. |
| * in_out: |
| * 1: enable/enter k8 temp mmio base |
| * 0: disable/restore |
| ***********************************************************/ |
| void ProgK8TempMmioBase(u8 in_out, u32 pcie_base_add, u32 mmio_base_add) |
| { |
| /* K8 Function1 is address map */ |
| device_t k8_f1 = dev_find_slot(0, PCI_DEVFN(0x18, 1)); |
| device_t k8_f0 = dev_find_slot(0, PCI_DEVFN(0x18, 0)); |
| |
| if (in_out) { |
| u32 dword, sblk; |
| |
| /* Get SBLink value (HyperTransport I/O Hub Link ID). */ |
| dword = pci_read_config32(k8_f0, 0x64); |
| sblk = (dword >> 8) & 0x3; |
| |
| /* Fill MMIO limit/base pair. */ |
| pci_write_config32(k8_f1, 0xbc, |
| (((pcie_base_add + 0x10000000 - |
| 1) >> 8) & 0xffffff00) | 0x80 | (sblk << 4)); |
| pci_write_config32(k8_f1, 0xb8, (pcie_base_add >> 8) | 0x3); |
| pci_write_config32(k8_f1, 0xb4, |
| (((mmio_base_add + 0x10000000 - |
| 1) >> 8) & 0xffffff00) | (sblk << 4)); |
| pci_write_config32(k8_f1, 0xb0, (mmio_base_add >> 8) | 0x3); |
| } else { |
| pci_write_config32(k8_f1, 0xb8, 0); |
| pci_write_config32(k8_f1, 0xbc, 0); |
| pci_write_config32(k8_f1, 0xb0, 0); |
| pci_write_config32(k8_f1, 0xb4, 0); |
| } |
| } |
| |
| void PcieReleasePortTraining(device_t nb_dev, device_t dev, u32 port) |
| { |
| switch (port) { |
| case 2: /* GFX, bit4-5 */ |
| case 3: |
| set_nbmisc_enable_bits(nb_dev, PCIE_LINK_CFG, |
| 1 << (port + 2), 0 << (port + 2)); |
| break; |
| case 4: /* GPPSB, bit20-24 */ |
| case 5: |
| case 6: |
| case 7: |
| set_nbmisc_enable_bits(nb_dev, PCIE_LINK_CFG, |
| 1 << (port + 17), 0 << (port + 17)); |
| break; |
| case 9: /* GPP, bit 4,5 of miscind 0x2D */ |
| case 10: |
| set_nbmisc_enable_bits(nb_dev, 0x2D, |
| 1 << (port - 5), 0 << (port - 5)); |
| break; |
| } |
| } |
| |
| /******************************************************************************************************** |
| * Output: |
| * 0: no device is present. |
| * 1: device is present and is trained. |
| ********************************************************************************************************/ |
| u8 PcieTrainPort(device_t nb_dev, device_t dev, u32 port) |
| { |
| u16 count = 5000; |
| u32 lc_state, reg, current_link_width, lane_mask; |
| int8_t current, res = 0; |
| u32 gfx_gpp_sb_sel; |
| void set_pcie_dereset(void); |
| void set_pcie_reset(void); |
| |
| switch (port) { |
| case 2 ... 3: |
| gfx_gpp_sb_sel = PCIE_CORE_INDEX_GFX; |
| break; |
| case 4 ... 7: |
| gfx_gpp_sb_sel = PCIE_CORE_INDEX_GPPSB; |
| break; |
| case 9 ... 10: |
| gfx_gpp_sb_sel = PCIE_CORE_INDEX_GPP; |
| break; |
| default: |
| gfx_gpp_sb_sel = -1; |
| return 0; |
| } |
| |
| while (count--) { |
| mdelay(40); |
| udelay(200); |
| lc_state = nbpcie_p_read_index(dev, 0xa5); /* lc_state */ |
| printk(BIOS_DEBUG, "PcieLinkTraining port=%x:lc current state=%x\n", |
| port, lc_state); |
| current = lc_state & 0x3f; /* get LC_CURRENT_STATE, bit0-5 */ |
| |
| switch (current) { |
| case 0x00: /* 0x00-0x04 means no device is present */ |
| case 0x01: |
| case 0x02: |
| case 0x03: |
| case 0x04: |
| res = 0; |
| count = 0; |
| break; |
| case 0x06: |
| /* read back current link width [6:4]. */ |
| current_link_width = (nbpcie_p_read_index(dev, 0xA2) >> 4) & 0x7; |
| /* 4 means 7:4 and 15:12 |
| * 3 means 7:2 and 15:10 |
| * 2 means 7:1 and 15:9 |
| * ignoring the reversal case |
| */ |
| lane_mask = (0xFF << (current_link_width - 2) * 2) & 0xFF; |
| reg = nbpcie_ind_read_index(nb_dev, 0x65 | gfx_gpp_sb_sel); |
| reg |= lane_mask << 8 | lane_mask; |
| reg = 0xE0E0; /* TODO: See the comments in rs780_pcie.c, at about line 145. */ |
| nbpcie_ind_write_index(nb_dev, 0x65 | gfx_gpp_sb_sel, reg); |
| printk(BIOS_DEBUG, "link_width=%x, lane_mask=%x", |
| current_link_width, lane_mask); |
| set_pcie_reset(); |
| mdelay(1); |
| set_pcie_dereset(); |
| break; |
| case 0x07: /* device is in compliance state (training sequence is done). Move to train the next device */ |
| res = 0; |
| count = 0; |
| break; |
| case 0x10: |
| reg = |
| pci_ext_read_config32(nb_dev, dev, |
| PCIE_VC0_RESOURCE_STATUS); |
| printk(BIOS_DEBUG, "PcieTrainPort reg=0x%x\n", reg); |
| /* check bit1 */ |
| if (reg & VC_NEGOTIATION_PENDING) { /* bit1=1 means the link needs to be re-trained. */ |
| /* set bit8=1, bit0-2=bit4-6 */ |
| u32 tmp; |
| reg = |
| nbpcie_p_read_index(dev, |
| PCIE_LC_LINK_WIDTH); |
| tmp = (reg >> 4) && 0x3; /* get bit4-6 */ |
| reg &= 0xfff8; /* clear bit0-2 */ |
| reg += tmp; /* merge */ |
| reg |= 1 << 8; |
| count++; /* CIM said "keep in loop"? */ |
| } else { |
| res = 1; |
| count = 0; |
| } |
| break; |
| default: /* reset pcie */ |
| res = 0; |
| count = 0; /* break loop */ |
| break; |
| } |
| } |
| return res; |
| } |
| |
| /* |
| * Compliant with CIM_33's ATINB_SetToms. |
| * Set Top Of Memory below and above 4G. |
| */ |
| void rs780_set_tom(device_t nb_dev) |
| { |
| /* set TOM */ |
| #if CONFIG_GFXUMA |
| pci_write_config32(nb_dev, 0x90, uma_memory_base); |
| //nbmc_write_index(nb_dev, 0x1e, uma_memory_base); |
| #else |
| /* 1GB system memory supposed */ |
| pci_write_config32(nb_dev, 0x90, 0x38000000); |
| //nbmc_write_index(nb_dev, 0x1e, 0x38000000); |
| #endif |
| } |
| |
| // extract single bit |
| u32 extractbit(u32 data, int bit_number) |
| { |
| return (data >> bit_number) & 1; |
| } |
| |
| // extract bit field |
| u32 extractbits(u32 source, int lsb, int msb) |
| { |
| int field_width = msb - lsb + 1; |
| u32 mask = 0xFFFFFFFF >> (32 - field_width); |
| return (source >> lsb) & mask; |
| } |
| |
| // return AMD cpuid family |
| int cpuidFamily(void) |
| { |
| u32 baseFamily, extendedFamily, fms; |
| |
| fms = cpuid_eax (1); |
| baseFamily = extractbits (fms, 8, 11); |
| extendedFamily = extractbits (fms, 20, 27); |
| return baseFamily + extendedFamily; |
| } |
| |
| |
| // return non-zero for AMD family 0Fh processor found |
| int is_family0Fh(void) |
| { |
| return cpuidFamily() == 0x0F; |
| } |
| |
| |
| // return non-zero for AMD family 10h processor found |
| int is_family10h(void) |
| { |
| return cpuidFamily() == 0x10; |
| } |