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qemu/include/hw/arm/aspeed_soc.h
Ninad Palsule 3fd941f3f1 hw/arm: Hook up FSI module in AST2600 
This patchset introduces IBM's Flexible Service Interface(FSI).

Time for some fun with inter-processor buses. FSI allows a service
processor access to the internal buses of a host POWER processor to
perform configuration or debugging.

FSI has long existed in POWER processes and so comes with some baggage,
including how it has been integrated into the ASPEED SoC.

Working backwards from the POWER processor, the fundamental pieces of
interest for the implementation are:

1. The Common FRU Access Macro (CFAM), an address space containing
   various "engines" that drive accesses on buses internal and external
   to the POWER chip. Examples include the SBEFIFO and I2C masters. The
   engines hang off of an internal Local Bus (LBUS) which is described
   by the CFAM configuration block.

2. The FSI slave: The slave is the terminal point of the FSI bus for
   FSI symbols addressed to it. Slaves can be cascaded off of one
   another. The slave's configuration registers appear in address space
   of the CFAM to which it is attached.

3. The FSI master: A controller in the platform service processor (e.g.
   BMC) driving CFAM engine accesses into the POWER chip. At the
   hardware level FSI is a bit-based protocol supporting synchronous and
   DMA-driven accesses of engines in a CFAM.

4. The On-Chip Peripheral Bus (OPB): A low-speed bus typically found in
   POWER processors. This now makes an appearance in the ASPEED SoC due
   to tight integration of the FSI master IP with the OPB, mainly the
   existence of an MMIO-mapping of the CFAM address straight onto a
   sub-region of the OPB address space.

5. An APB-to-OPB bridge enabling access to the OPB from the ARM core in
   the AST2600. Hardware limitations prevent the OPB from being directly
   mapped into APB, so all accesses are indirect through the bridge.

The implementation appears as following in the qemu device tree:

    (qemu) info qtree
    bus: main-system-bus
      type System
      ...
      dev: aspeed.apb2opb, id ""
        gpio-out "sysbus-irq" 1
        mmio 000000001e79b000/0000000000001000
        bus: opb.1
          type opb
          dev: fsi.master, id ""
            bus: fsi.bus.1
              type fsi.bus
              dev: cfam.config, id ""
              dev: cfam, id ""
                bus: fsi.lbus.1
                  type lbus
                  dev: scratchpad, id ""
                    address = 0 (0x0)
        bus: opb.0
          type opb
          dev: fsi.master, id ""
            bus: fsi.bus.0
              type fsi.bus
              dev: cfam.config, id ""
              dev: cfam, id ""
                bus: fsi.lbus.0
                  type lbus
                  dev: scratchpad, id ""
                    address = 0 (0x0)

The LBUS is modelled to maintain the qdev bus hierarchy and to take
advantage of the object model to automatically generate the CFAM
configuration block. The configuration block presents engines in the
order they are attached to the CFAM's LBUS. Engine implementations
should subclass the LBusDevice and set the 'config' member of
LBusDeviceClass to match the engine's type.

CFAM designs offer a lot of flexibility, for instance it is possible for
a CFAM to be simultaneously driven from multiple FSI links. The modeling
is not so complete; it's assumed that each CFAM is attached to a single
FSI slave (as a consequence the CFAM subclasses the FSI slave).

As for FSI, its symbols and wire-protocol are not modelled at all. This
is not necessary to get FSI off the ground thanks to the mapping of the
CFAM address space onto the OPB address space - the models follow this
directly and map the CFAM memory region into the OPB's memory region.
Future work includes supporting more advanced accesses that drive the
FSI master directly rather than indirectly via the CFAM mapping, which
will require implementing the FSI state machine and methods for each of
the FSI symbols on the slave. Further down the track we can also look at
supporting the bitbanged SoftFSI drivers in Linux by extending the FSI
slave model to resolve sequences of GPIO IRQs into FSI symbols, and
calling the associated symbol method on the slave to map the access onto
the CFAM.

Testing:
    Tested by reading cfam config address 0 on rainier machine type.

    root@p10bmc:~# pdbg -a getcfam 0x0
    p0: 0x0 = 0xc0022d15

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2024-02-01 08:33:18 +01:00

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/*
* ASPEED SoC family
*
* Andrew Jeffery <andrew@aj.id.au>
*
* Copyright 2016 IBM Corp.
*
* This code is licensed under the GPL version 2 or later. See
* the COPYING file in the top-level directory.
*/
#ifndef ASPEED_SOC_H
#define ASPEED_SOC_H
#include "hw/cpu/a15mpcore.h"
#include "hw/arm/armv7m.h"
#include "hw/intc/aspeed_vic.h"
#include "hw/misc/aspeed_scu.h"
#include "hw/adc/aspeed_adc.h"
#include "hw/misc/aspeed_sdmc.h"
#include "hw/misc/aspeed_xdma.h"
#include "hw/timer/aspeed_timer.h"
#include "hw/rtc/aspeed_rtc.h"
#include "hw/i2c/aspeed_i2c.h"
#include "hw/misc/aspeed_i3c.h"
#include "hw/ssi/aspeed_smc.h"
#include "hw/misc/aspeed_hace.h"
#include "hw/misc/aspeed_sbc.h"
#include "hw/watchdog/wdt_aspeed.h"
#include "hw/net/ftgmac100.h"
#include "target/arm/cpu.h"
#include "hw/gpio/aspeed_gpio.h"
#include "hw/sd/aspeed_sdhci.h"
#include "hw/usb/hcd-ehci.h"
#include "qom/object.h"
#include "hw/misc/aspeed_lpc.h"
#include "hw/misc/unimp.h"
#include "hw/misc/aspeed_peci.h"
#include "hw/fsi/aspeed_apb2opb.h"
#include "hw/char/serial.h"
#define ASPEED_SPIS_NUM 2
#define ASPEED_EHCIS_NUM 2
#define ASPEED_WDTS_NUM 4
#define ASPEED_CPUS_NUM 2
#define ASPEED_MACS_NUM 4
#define ASPEED_UARTS_NUM 13
#define ASPEED_JTAG_NUM 2
struct AspeedSoCState {
DeviceState parent;
MemoryRegion *memory;
MemoryRegion *dram_mr;
MemoryRegion dram_container;
MemoryRegion sram;
MemoryRegion spi_boot_container;
MemoryRegion spi_boot;
AspeedRtcState rtc;
AspeedTimerCtrlState timerctrl;
AspeedI2CState i2c;
AspeedI3CState i3c;
AspeedSCUState scu;
AspeedHACEState hace;
AspeedXDMAState xdma;
AspeedADCState adc;
AspeedSMCState fmc;
AspeedSMCState spi[ASPEED_SPIS_NUM];
EHCISysBusState ehci[ASPEED_EHCIS_NUM];
AspeedSBCState sbc;
MemoryRegion secsram;
UnimplementedDeviceState sbc_unimplemented;
AspeedSDMCState sdmc;
AspeedWDTState wdt[ASPEED_WDTS_NUM];
FTGMAC100State ftgmac100[ASPEED_MACS_NUM];
AspeedMiiState mii[ASPEED_MACS_NUM];
AspeedGPIOState gpio;
AspeedGPIOState gpio_1_8v;
AspeedSDHCIState sdhci;
AspeedSDHCIState emmc;
AspeedLPCState lpc;
AspeedPECIState peci;
SerialMM uart[ASPEED_UARTS_NUM];
Clock *sysclk;
UnimplementedDeviceState iomem;
UnimplementedDeviceState video;
UnimplementedDeviceState emmc_boot_controller;
UnimplementedDeviceState dpmcu;
UnimplementedDeviceState pwm;
UnimplementedDeviceState espi;
UnimplementedDeviceState udc;
UnimplementedDeviceState sgpiom;
UnimplementedDeviceState jtag[ASPEED_JTAG_NUM];
AspeedAPB2OPBState fsi[2];
};
#define TYPE_ASPEED_SOC "aspeed-soc"
OBJECT_DECLARE_TYPE(AspeedSoCState, AspeedSoCClass, ASPEED_SOC)
struct Aspeed2400SoCState {
AspeedSoCState parent;
ARMCPU cpu[ASPEED_CPUS_NUM];
AspeedVICState vic;
};
#define TYPE_ASPEED2400_SOC "aspeed2400-soc"
OBJECT_DECLARE_SIMPLE_TYPE(Aspeed2400SoCState, ASPEED2400_SOC)
struct Aspeed2600SoCState {
AspeedSoCState parent;
A15MPPrivState a7mpcore;
ARMCPU cpu[ASPEED_CPUS_NUM]; /* XXX belong to a7mpcore */
};
#define TYPE_ASPEED2600_SOC "aspeed2600-soc"
OBJECT_DECLARE_SIMPLE_TYPE(Aspeed2600SoCState, ASPEED2600_SOC)
struct Aspeed10x0SoCState {
AspeedSoCState parent;
ARMv7MState armv7m;
};
#define TYPE_ASPEED10X0_SOC "aspeed10x0-soc"
OBJECT_DECLARE_SIMPLE_TYPE(Aspeed10x0SoCState, ASPEED10X0_SOC)
struct AspeedSoCClass {
DeviceClass parent_class;
const char *name;
/** valid_cpu_types: NULL terminated array of a single CPU type. */
const char * const *valid_cpu_types;
uint32_t silicon_rev;
uint64_t sram_size;
uint64_t secsram_size;
int spis_num;
int ehcis_num;
int wdts_num;
int macs_num;
int uarts_num;
const int *irqmap;
const hwaddr *memmap;
uint32_t num_cpus;
qemu_irq (*get_irq)(AspeedSoCState *s, int dev);
};
const char *aspeed_soc_cpu_type(AspeedSoCClass *sc);
enum {
ASPEED_DEV_SPI_BOOT,
ASPEED_DEV_IOMEM,
ASPEED_DEV_UART1,
ASPEED_DEV_UART2,
ASPEED_DEV_UART3,
ASPEED_DEV_UART4,
ASPEED_DEV_UART5,
ASPEED_DEV_UART6,
ASPEED_DEV_UART7,
ASPEED_DEV_UART8,
ASPEED_DEV_UART9,
ASPEED_DEV_UART10,
ASPEED_DEV_UART11,
ASPEED_DEV_UART12,
ASPEED_DEV_UART13,
ASPEED_DEV_VUART,
ASPEED_DEV_FMC,
ASPEED_DEV_SPI1,
ASPEED_DEV_SPI2,
ASPEED_DEV_EHCI1,
ASPEED_DEV_EHCI2,
ASPEED_DEV_VIC,
ASPEED_DEV_SDMC,
ASPEED_DEV_SCU,
ASPEED_DEV_ADC,
ASPEED_DEV_SBC,
ASPEED_DEV_SECSRAM,
ASPEED_DEV_EMMC_BC,
ASPEED_DEV_VIDEO,
ASPEED_DEV_SRAM,
ASPEED_DEV_SDHCI,
ASPEED_DEV_GPIO,
ASPEED_DEV_GPIO_1_8V,
ASPEED_DEV_RTC,
ASPEED_DEV_TIMER1,
ASPEED_DEV_TIMER2,
ASPEED_DEV_TIMER3,
ASPEED_DEV_TIMER4,
ASPEED_DEV_TIMER5,
ASPEED_DEV_TIMER6,
ASPEED_DEV_TIMER7,
ASPEED_DEV_TIMER8,
ASPEED_DEV_WDT,
ASPEED_DEV_PWM,
ASPEED_DEV_LPC,
ASPEED_DEV_IBT,
ASPEED_DEV_I2C,
ASPEED_DEV_PECI,
ASPEED_DEV_ETH1,
ASPEED_DEV_ETH2,
ASPEED_DEV_ETH3,
ASPEED_DEV_ETH4,
ASPEED_DEV_MII1,
ASPEED_DEV_MII2,
ASPEED_DEV_MII3,
ASPEED_DEV_MII4,
ASPEED_DEV_SDRAM,
ASPEED_DEV_XDMA,
ASPEED_DEV_EMMC,
ASPEED_DEV_KCS,
ASPEED_DEV_HACE,
ASPEED_DEV_DPMCU,
ASPEED_DEV_DP,
ASPEED_DEV_I3C,
ASPEED_DEV_ESPI,
ASPEED_DEV_UDC,
ASPEED_DEV_SGPIOM,
ASPEED_DEV_JTAG0,
ASPEED_DEV_JTAG1,
ASPEED_DEV_FSI1,
ASPEED_DEV_FSI2,
};
#define ASPEED_SOC_SPI_BOOT_ADDR 0x0
qemu_irq aspeed_soc_get_irq(AspeedSoCState *s, int dev);
bool aspeed_soc_uart_realize(AspeedSoCState *s, Error **errp);
void aspeed_soc_uart_set_chr(AspeedSoCState *s, int dev, Chardev *chr);
bool aspeed_soc_dram_init(AspeedSoCState *s, Error **errp);
void aspeed_mmio_map(AspeedSoCState *s, SysBusDevice *dev, int n, hwaddr addr);
void aspeed_mmio_map_unimplemented(AspeedSoCState *s, SysBusDevice *dev,
const char *name, hwaddr addr,
uint64_t size);
void aspeed_board_init_flashes(AspeedSMCState *s, const char *flashtype,
unsigned int count, int unit0);
#endif /* ASPEED_SOC_H */
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