mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
1ffbc51a0d
This reduces the need from two timers to one timer. Moreover, without this patch, when the "ticker" timer triggers timer_cs_read via tick_periodic it reads the value of the usual timer it can get an wrapped timer value without timer_cs_internal_counter having been updated leading to the clock going backwards. This effectively hangs one cpu that gets stuck in update_wall_time with an offset slightly smaller than 0xffffffffffffffff. Signed-off-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
267 lines
8.0 KiB
C
267 lines
8.0 KiB
C
/*
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*Copyright (C) 2004 Konrad Eisele (eiselekd@web.de,konrad@gaisler.com), Gaisler Research
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*Copyright (C) 2004 Stefan Holst (mail@s-holst.de), Uni-Stuttgart
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*Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com),Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
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*/
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#ifndef LEON_AMBA_H_INCLUDE
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#define LEON_AMBA_H_INCLUDE
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#ifndef __ASSEMBLY__
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struct amba_prom_registers {
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unsigned int phys_addr; /* The physical address of this register */
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unsigned int reg_size; /* How many bytes does this register take up? */
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};
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#endif
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/*
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* The following defines the bits in the LEON UART Status Registers.
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*/
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#define LEON_REG_UART_STATUS_DR 0x00000001 /* Data Ready */
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#define LEON_REG_UART_STATUS_TSE 0x00000002 /* TX Send Register Empty */
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#define LEON_REG_UART_STATUS_THE 0x00000004 /* TX Hold Register Empty */
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#define LEON_REG_UART_STATUS_BR 0x00000008 /* Break Error */
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#define LEON_REG_UART_STATUS_OE 0x00000010 /* RX Overrun Error */
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#define LEON_REG_UART_STATUS_PE 0x00000020 /* RX Parity Error */
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#define LEON_REG_UART_STATUS_FE 0x00000040 /* RX Framing Error */
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#define LEON_REG_UART_STATUS_ERR 0x00000078 /* Error Mask */
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/*
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* The following defines the bits in the LEON UART Ctrl Registers.
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*/
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#define LEON_REG_UART_CTRL_RE 0x00000001 /* Receiver enable */
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#define LEON_REG_UART_CTRL_TE 0x00000002 /* Transmitter enable */
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#define LEON_REG_UART_CTRL_RI 0x00000004 /* Receiver interrupt enable */
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#define LEON_REG_UART_CTRL_TI 0x00000008 /* Transmitter irq */
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#define LEON_REG_UART_CTRL_PS 0x00000010 /* Parity select */
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#define LEON_REG_UART_CTRL_PE 0x00000020 /* Parity enable */
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#define LEON_REG_UART_CTRL_FL 0x00000040 /* Flow control enable */
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#define LEON_REG_UART_CTRL_LB 0x00000080 /* Loop Back enable */
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#define LEON3_GPTIMER_EN 1
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#define LEON3_GPTIMER_RL 2
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#define LEON3_GPTIMER_LD 4
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#define LEON3_GPTIMER_IRQEN 8
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#define LEON3_GPTIMER_SEPIRQ 8
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#define LEON3_GPTIMER_TIMERS 0x7
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#define LEON23_REG_TIMER_CONTROL_EN 0x00000001 /* 1 = enable counting */
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/* 0 = hold scalar and counter */
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#define LEON23_REG_TIMER_CONTROL_RL 0x00000002 /* 1 = reload at 0 */
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/* 0 = stop at 0 */
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#define LEON23_REG_TIMER_CONTROL_LD 0x00000004 /* 1 = load counter */
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/* 0 = no function */
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#define LEON23_REG_TIMER_CONTROL_IQ 0x00000008 /* 1 = irq enable */
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/* 0 = no function */
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/*
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* The following defines the bits in the LEON PS/2 Status Registers.
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*/
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#define LEON_REG_PS2_STATUS_DR 0x00000001 /* Data Ready */
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#define LEON_REG_PS2_STATUS_PE 0x00000002 /* Parity error */
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#define LEON_REG_PS2_STATUS_FE 0x00000004 /* Framing error */
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#define LEON_REG_PS2_STATUS_KI 0x00000008 /* Keyboard inhibit */
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#define LEON_REG_PS2_STATUS_RF 0x00000010 /* RX buffer full */
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#define LEON_REG_PS2_STATUS_TF 0x00000020 /* TX buffer full */
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/*
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* The following defines the bits in the LEON PS/2 Ctrl Registers.
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*/
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#define LEON_REG_PS2_CTRL_RE 0x00000001 /* Receiver enable */
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#define LEON_REG_PS2_CTRL_TE 0x00000002 /* Transmitter enable */
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#define LEON_REG_PS2_CTRL_RI 0x00000004 /* Keyboard receive irq */
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#define LEON_REG_PS2_CTRL_TI 0x00000008 /* Keyboard transmit irq */
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#define LEON3_IRQMPSTATUS_CPUNR 28
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#define LEON3_IRQMPSTATUS_BROADCAST 27
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#define GPTIMER_CONFIG_IRQNT(a) (((a) >> 3) & 0x1f)
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#define GPTIMER_CONFIG_ISSEP(a) ((a) & (1 << 8))
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#define GPTIMER_CONFIG_NTIMERS(a) ((a) & (0x7))
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#define LEON3_GPTIMER_CTRL_PENDING 0x10
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#define LEON3_GPTIMER_CONFIG_NRTIMERS(c) ((c)->config & 0x7)
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#define LEON3_GPTIMER_CTRL_ISPENDING(r) (((r)&LEON3_GPTIMER_CTRL_PENDING) ? 1 : 0)
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#ifndef __ASSEMBLY__
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struct leon3_irqctrl_regs_map {
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u32 ilevel;
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u32 ipend;
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u32 iforce;
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u32 iclear;
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u32 mpstatus;
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u32 mpbroadcast;
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u32 notused02;
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u32 notused03;
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u32 ampctrl;
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u32 icsel[2];
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u32 notused13;
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u32 notused20;
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u32 notused21;
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u32 notused22;
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u32 notused23;
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u32 mask[16];
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u32 force[16];
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/* Extended IRQ registers */
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u32 intid[16]; /* 0xc0 */
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u32 unused[(0x1000-0x100)/4];
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};
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struct leon3_apbuart_regs_map {
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u32 data;
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u32 status;
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u32 ctrl;
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u32 scaler;
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};
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struct leon3_gptimerelem_regs_map {
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u32 val;
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u32 rld;
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u32 ctrl;
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u32 unused;
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};
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struct leon3_gptimer_regs_map {
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u32 scalar;
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u32 scalar_reload;
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u32 config;
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u32 unused;
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struct leon3_gptimerelem_regs_map e[8];
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};
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/*
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* Types and structure used for AMBA Plug & Play bus scanning
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*/
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#define AMBA_MAXAPB_DEVS 64
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#define AMBA_MAXAPB_DEVS_PERBUS 16
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struct amba_device_table {
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int devnr; /* number of devices on AHB or APB bus */
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unsigned int *addr[16]; /* addresses to the devices configuration tables */
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unsigned int allocbits[1]; /* 0=unallocated, 1=allocated driver */
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};
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struct amba_apbslv_device_table {
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int devnr; /* number of devices on AHB or APB bus */
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unsigned int *addr[AMBA_MAXAPB_DEVS]; /* addresses to the devices configuration tables */
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unsigned int apbmst[AMBA_MAXAPB_DEVS]; /* apb master if a entry is a apb slave */
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unsigned int apbmstidx[AMBA_MAXAPB_DEVS]; /* apb master idx if a entry is a apb slave */
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unsigned int allocbits[4]; /* 0=unallocated, 1=allocated driver */
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};
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struct amba_confarea_type {
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struct amba_confarea_type *next;/* next bus in chain */
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struct amba_device_table ahbmst;
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struct amba_device_table ahbslv;
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struct amba_apbslv_device_table apbslv;
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unsigned int apbmst;
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};
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/* collect apb slaves */
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struct amba_apb_device {
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unsigned int start, irq, bus_id;
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struct amba_confarea_type *bus;
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};
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/* collect ahb slaves */
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struct amba_ahb_device {
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unsigned int start[4], irq, bus_id;
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struct amba_confarea_type *bus;
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};
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struct device_node;
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void _amba_init(struct device_node *dp, struct device_node ***nextp);
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extern unsigned long amba_system_id;
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extern struct leon3_irqctrl_regs_map *leon3_irqctrl_regs;
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extern struct leon3_gptimer_regs_map *leon3_gptimer_regs;
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extern struct amba_apb_device leon_percpu_timer_dev[16];
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extern int leondebug_irq_disable;
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extern int leon_debug_irqout;
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extern unsigned long leon3_gptimer_irq;
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extern unsigned int sparc_leon_eirq;
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#endif /* __ASSEMBLY__ */
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#define LEON3_IO_AREA 0xfff00000
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#define LEON3_CONF_AREA 0xff000
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#define LEON3_AHB_SLAVE_CONF_AREA (1 << 11)
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#define LEON3_AHB_CONF_WORDS 8
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#define LEON3_APB_CONF_WORDS 2
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#define LEON3_AHB_MASTERS 16
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#define LEON3_AHB_SLAVES 16
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#define LEON3_APB_SLAVES 16
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#define LEON3_APBUARTS 8
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/* Vendor codes */
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#define VENDOR_GAISLER 1
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#define VENDOR_PENDER 2
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#define VENDOR_ESA 4
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#define VENDOR_OPENCORES 8
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/* Gaisler Research device id's */
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#define GAISLER_LEON3 0x003
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#define GAISLER_LEON3DSU 0x004
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#define GAISLER_ETHAHB 0x005
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#define GAISLER_APBMST 0x006
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#define GAISLER_AHBUART 0x007
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#define GAISLER_SRCTRL 0x008
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#define GAISLER_SDCTRL 0x009
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#define GAISLER_APBUART 0x00C
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#define GAISLER_IRQMP 0x00D
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#define GAISLER_AHBRAM 0x00E
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#define GAISLER_GPTIMER 0x011
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#define GAISLER_PCITRG 0x012
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#define GAISLER_PCISBRG 0x013
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#define GAISLER_PCIFBRG 0x014
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#define GAISLER_PCITRACE 0x015
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#define GAISLER_PCIDMA 0x016
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#define GAISLER_AHBTRACE 0x017
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#define GAISLER_ETHDSU 0x018
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#define GAISLER_PIOPORT 0x01A
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#define GAISLER_GRGPIO 0x01A
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#define GAISLER_AHBJTAG 0x01c
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#define GAISLER_ETHMAC 0x01D
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#define GAISLER_AHB2AHB 0x020
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#define GAISLER_USBDC 0x021
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#define GAISLER_ATACTRL 0x024
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#define GAISLER_DDRSPA 0x025
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#define GAISLER_USBEHC 0x026
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#define GAISLER_USBUHC 0x027
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#define GAISLER_I2CMST 0x028
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#define GAISLER_SPICTRL 0x02D
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#define GAISLER_DDR2SPA 0x02E
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#define GAISLER_SPIMCTRL 0x045
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#define GAISLER_LEON4 0x048
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#define GAISLER_LEON4DSU 0x049
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#define GAISLER_AHBSTAT 0x052
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#define GAISLER_FTMCTRL 0x054
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#define GAISLER_KBD 0x060
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#define GAISLER_VGA 0x061
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#define GAISLER_SVGA 0x063
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#define GAISLER_GRSYSMON 0x066
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#define GAISLER_GRACECTRL 0x067
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#define GAISLER_L2TIME 0xffd /* internal device: leon2 timer */
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#define GAISLER_L2C 0xffe /* internal device: leon2compat */
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#define GAISLER_PLUGPLAY 0xfff /* internal device: plug & play configarea */
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/* Chip IDs */
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#define AEROFLEX_UT699 0x0699
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#define LEON4_NEXTREME1 0x0102
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#define GAISLER_GR712RC 0x0712
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#define amba_vendor(x) (((x) >> 24) & 0xff)
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#define amba_device(x) (((x) >> 12) & 0xfff)
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#endif
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