src/northbridge/intel/i440bx/i440bx.h

/* SPDX-License-Identifier: GPL-2.0-or-later */

#ifndef NORTHBRIDGE_INTEL_I440BX_I440BX_H
#define NORTHBRIDGE_INTEL_I440BX_I440BX_H

/*
 * Datasheet:
 *   - Name: Intel 440BX AGPset: 82443BX Host Bridge/Controller
 *   - URL: http://www.intel.com/design/chipsets/datashts/290633.htm
 *   - PDF: http://www.intel.com/design/chipsets/datashts/29063301.pdf
 *   - Order Number: 290633-001
 */

/*
 * Host-to-PCI Bridge Registers.
 * The values in parenthesis are the default values as per datasheet.
 * Any addresses between 0x00 and 0xff not listed below are either
 * Reserved or Intel Reserved and should not be touched.
 */

#define NBXCFG  0x50 /* 440BX Configuration (0x0000:00S0_0000_000S_0S00b). */
#define DRAMC   0x57 /* DRAM Control (00S0_0000b). */
#define DRAMT   0x58 /* DRAM Timing (0x03). */
#define PAM     0x59 /* Programmable Attribute Map, 7 registers (0x00). */
#define PAM0    0x59
#define PAM1    0x5a
#define PAM2    0x5b
#define PAM3    0x5c
#define PAM4    0x5d
#define PAM5    0x5e
#define PAM6    0x5f
#define DRB     0x60 /* DRAM Row Boundary, 8 registers (0x01). */
#define DRB0    0x60
#define DRB1    0x61
#define DRB2    0x62
#define DRB3    0x63
#define DRB4    0x64
#define DRB5    0x65
#define DRB6    0x66
#define DRB7    0x67
#define FDHC    0x68 /* Fixed SDRAM Hole Control (0x00). */
#define MBSC    0x69 /* Memory Buffer Strength Control (0x0000-0000-0000). */
#define SMRAM   0x72 /* System Management RAM Control (0x02). */
#define ESMRAMC 0x73 /* Extended System Management RAM Control (0x38). */
#define RPS     0x74 /* SDRAM Row Page Size (0x0000). */
#define SDRAMC  0x76 /* SDRAM Control Register (0x0000). */
#define PGPOL   0x78 /* Paging Policy Register (0x00). */
#define PMCR    0x7a /* Power Management Control Register (0000_S0S0b). */
#define SCRR    0x7b /* Suspend CBR Refresh Rate Register (0x0038). */
#define EAP     0x80 /* Error Address Pointer Register (0x00000000). */
#define ERRCMD  0x90 /* Error Command Register (0x80). */
#define ERRSTS  0x91 /* Error Status (0x0000). */
// TODO: AGP stuff.
#define ACAPID  0xa0 /* AGP Capability Identifier (0x00100002 or 0x00000000) */
#define AGPSTAT 0xa4 /* AGP Status Register (0x1f000203, read only) */
#define AGPCMD  0xa8 /* AGP Command Register (0x00000000) */
#define AGPCTRL 0xb0 /* AGP Control Register (0x00000000) */
#define APSIZE  0xb4 /* Aperture Size Control Register (0x00) */
#define ATTBASE 0xb8 /* Aperture Translation Table (0x00000000) */

#define MBFS    0xca /* Memory Buffer Frequency Select (0x000000). */
#define BSPAD   0xd0 /* BIOS Scratch Pad (0x000..000). */
#define BSPAD0  0xd0 /* These are free for our use. */
#define BSPAD1  0xd1
#define BSPAD2  0xd2
#define BSPAD3  0xd3
#define BSPAD4  0xd4
#define BSPAD5  0xd5
#define BSPAD6  0xd6
#define BSPAD7  0xd7
#define DWTC    0xe0 /* DRAM Write Thermal Throttling Control (0x000..000). */
#define DRTC    0xe8 /* DRAM Read Thermal Throttling Control (0x000..000). */
#define BUFFC   0xf0 /* Buffer Control Register (0x0000). */

#define NB PCI_DEV(0, 0, 0)

#endif /* NORTHBRIDGE_INTEL_I440BX_I440BX_H */