X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=dev%2Fide_ctrl.hh;h=f1082d09499bff6bbc645309182317c7a98aed6f;hb=797661b6e1297750d3c1782653a4145b9014dbf1;hp=ac25eafe7fc890ca10b33214b14929d41aca5c76;hpb=f4168a708c15c219a968d9cd665b571705467875;p=gem5.git diff --git a/dev/ide_ctrl.hh b/dev/ide_ctrl.hh index ac25eafe7..f1082d094 100644 --- a/dev/ide_ctrl.hh +++ b/dev/ide_ctrl.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003 The Regents of The University of Michigan + * Copyright (c) 2004 The Regents of The University of Michigan * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -27,7 +27,8 @@ */ /** @file - * Simple PCI IDE controller with bus mastering capability + * Simple PCI IDE controller with bus mastering capability and UDMA + * modeled after controller in the Intel PIIX4 chip */ #ifndef __IDE_CTRL_HH__ @@ -37,12 +38,6 @@ #include "dev/pcireg.h" #include "dev/io_device.hh" -#define CMD0 0x00 // Channel 0 command block offset -#define CTRL0 0x08 // Channel 0 control block offset -#define CMD1 0x0c // Channel 1 command block offset -#define CTRL1 0x14 // Channel 1 control block offset -#define BMI 0x18 // Bus master IDE offset - #define BMIC0 0x0 // Bus master IDE command register #define BMIS0 0x2 // Bus master IDE status register #define BMIDTP0 0x4 // Bus master IDE descriptor table pointer register @@ -62,17 +57,8 @@ #define BMIDEA 0x01 // Bus master IDE active // IDE Command byte fields -// Taken from include/linux/ide.h -#define IDE_DATA_OFFSET (0) -#define IDE_ERROR_OFFSET (1) -#define IDE_NSECTOR_OFFSET (2) -#define IDE_SECTOR_OFFSET (3) -#define IDE_LCYL_OFFSET (4) -#define IDE_HCYL_OFFSET (5) #define IDE_SELECT_OFFSET (6) -#define IDE_STATUS_OFFSET (7) -#define IDE_CONTROL_OFFSET (8) -#define IDE_IRQ_OFFSET (9) +#define IDE_SELECT_DEV_BIT 0x10 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET @@ -88,18 +74,20 @@ #define UDMACTL (5) #define UDMATIM (6) -// PCI Command bit fields -#define BME 0x04 // Bus master function enable -#define IOSE 0x01 // I/O space enable +typedef enum RegType { + COMMAND_BLOCK = 0, + CONTROL_BLOCK, + BMI_BLOCK +} RegType_t; -class IntrControl; +class BaseInterface; +class Bus; +class HierParams; class IdeDisk; +class IntrControl; class PciConfigAll; -class Tsunami; class PhysicalMemory; -class BaseInterface; -class HierParams; -class Bus; +class Platform; /** * Device model for an Intel PIIX4 IDE controller @@ -107,6 +95,8 @@ class Bus; class IdeController : public PciDev { + friend class IdeDisk; + private: /** Primary command block registers */ Addr pri_cmd_addr; @@ -125,8 +115,10 @@ class IdeController : public PciDev Addr bmi_size; private: - /** Registers used for programmed I/O and bus master interface */ - uint8_t regs[40]; + /** Registers used for bus master interface */ + uint8_t bmi_regs[16]; + /** Shadows of the device select bit */ + uint8_t dev[2]; /** Registers used in PCI configuration */ uint8_t pci_regs[8]; @@ -136,88 +128,44 @@ class IdeController : public PciDev bool cmd_in_progress[4]; private: - /** Pointer to the chipset */ - Tsunami *tsunami; /** IDE disks connected to controller */ IdeDisk *disks[4]; private: - /** Get offset into register file from access address */ - Addr getOffset(const Addr &addr) { - Addr offset = addr; + /** Parse the access address to pass on to device */ + void parseAddr(const Addr &addr, Addr &offset, bool &primary, + RegType_t &type); - if (addr >= pri_cmd_addr && addr < (pri_cmd_addr + pri_cmd_size)) { - offset -= pri_cmd_addr; - offset += CMD0; - } else if (addr >= pri_ctrl_addr && - addr < (pri_ctrl_addr + pri_ctrl_size)) { - offset -= pri_ctrl_addr; - offset += CTRL0; - } else if (addr >= sec_cmd_addr && - addr < (sec_cmd_addr + sec_cmd_size)) { - offset -= sec_cmd_addr; - offset += CMD1; - } else if (addr >= sec_ctrl_addr && - addr < (sec_ctrl_addr + sec_ctrl_size)) { - offset -= sec_ctrl_addr; - offset += CTRL1; - } else if (addr >= bmi_addr && addr < (bmi_addr + bmi_size)) { - offset -= bmi_addr; - offset += BMI; - } else { - panic("IDE controller access to invalid address: %#x\n", addr); - } + /** Select the disk based on the channel and device bit */ + int getDisk(bool primary); - return offset; - }; - /** Select the disk based on the register offset */ - int getDisk(const Addr &offset) { - int disk = 0; + /** Select the disk based on a pointer */ + int getDisk(IdeDisk *diskPtr); - // If the offset is in the channel 1 range, disks are 2 or 3 - if (offset >= CMD1 && offset < BMI && offset >= (BMI + BMIC1)) - disk += 2; - - if (disk < 2) { - if (regs[CMD0 + IDE_STATUS_OFFSET] & 0x10) - disk += 1; - } else { - if (regs[CMD1 + IDE_STATUS_OFFSET] & 0x10) - disk += 1; - } + public: + /** See if a disk is selected based on its pointer */ + bool isDiskSelected(IdeDisk *diskPtr); - return disk; + public: + struct Params : public PciDev::Params + { + /** Array of disk objects */ + std::vector disks; + Bus *host_bus; + Tick pio_latency; + HierParams *hier; }; + const Params *params() const { return (const Params *)_params; } public: - /** - * Constructs and initializes this controller. - * @param name The name of this controller. - * @param ic The interrupt controller. - * @param mmu The memory controller - * @param cf PCI config space - * @param cd PCI config data - * @param bus_num The PCI bus number - * @param dev_num The PCI device number - * @param func_num The PCI function number - * @param host_bus The host bus to connect to - * @param hier The hierarchy parameters - */ - IdeController(const std::string &name, IntrControl *ic, - const vector &new_disks, - MemoryController *mmu, PciConfigAll *cf, - PciConfigData *cd, Tsunami *t, - uint32_t bus_num, uint32_t dev_num, uint32_t func_num, - Bus *host_bus, HierParams *hier); - - /** - * Deletes the connected devices. - */ + IdeController(Params *p); ~IdeController(); virtual void WriteConfig(int offset, int size, uint32_t data); virtual void ReadConfig(int offset, int size, uint8_t *data); + void setDmaComplete(IdeDisk *disk); + /** * Read a done field for a given target. * @param req Contains the address of the field to read. @@ -234,12 +182,6 @@ class IdeController : public PciDev */ virtual Fault write(MemReqPtr &req, const uint8_t *data); - /** - * Cache access timing specific to device - * @param req Memory request - */ - Tick cacheAccess(MemReqPtr &req); - /** * Serialize this object to the given output stream. * @param os The stream to serialize to. @@ -253,5 +195,11 @@ class IdeController : public PciDev */ virtual void unserialize(Checkpoint *cp, const std::string §ion); + /** + * Return how long this access will take. + * @param req the memory request to calcuate + * @return Tick when the request is done + */ + Tick cacheAccess(MemReqPtr &req); }; #endif // __IDE_CTRL_HH_