Question

我正在尝试为Fastmodel上的Kite处理器配置定时器中断。

我已启用GICD启用定时器中断，并且一旦定时器为0，它也会更新为挂起但是要将其接收到cpu接口，我需要在GICR中启用它。

尝试在GICR中启用它时，在运行模拟时寄存器不会更新。 仅更新GICR_IGROUPR0。 GICR_ISENABLER0注册没有更新。

有没有人知道为什么只有1个注册才能更新而不能更新？

我是否需要任何特定配置才能使用GICR寄存器？为什么只有1个寄存器能够更新？

#define GICC_OFFSET 0x00
#define GICD_OFFSET 0x00
#define GICR_OFFSET 0x0100000
#define GICR_SGI_PPI_OFFSET 0x110000 // for core 0
/* CBAR is read and then the offset for Distributor and CPU Interfaces           are added */
#define GICREG(gic, reg) (*REG32(hal_arm_gic_get_base() + (reg)))

/* Redistributor control registor GICR_ */

#define GICR_CTLR (GICR_OFFSET + 0x00)

/* Redistributor for SGI and PPI for core 0*/
#define GICR_IGROUPR0 (GICR_SGI_PPI_OFFSET + 0x80)
#define GICR_ISENABLER0 (GICR_SGI_PPI_OFFSET + 0x100)
#define GICR_ICENABLER0 (GICR_SGI_PPI_OFFSET + 0x180)
#define GICR_ISPENDR0 (GICR_SGI_PPI_OFFSET + 0x200)
#define GICR_ICPENDR0 (GICR_SGI_PPI_OFFSET + 0x280)
#define GICR_ISACTIVER0 (GICR_SGI_PPI_OFFSET + 0x300)
#define GICR_ICACTIVER0 (GICR_SGI_PPI_OFFSET + 0x380)
#define GICR_IPRIORITYR(n) (GICR_SGI_PPI_OFFSET + 0x400 + (n) * 4)
#define GICR_ICFGR0 (GICR_SGI_PPI_OFFSET + 0xc00)
#define GICR_ICFGR1 (GICR_SGI_PPI_OFFSET + 0xc04)

/* distribution regs */
#define GICD_CTLR               (GICD_OFFSET + 0x000u)
#define GICD_TYPER              (GICD_OFFSET + 0x004u)
#define GICD_IIDR               (GICD_OFFSET + 0x008u)
#define GICD_IGROUPR(n)         (GICD_OFFSET + 0x080u + (n) * 4u)
#define GICD_ISENABLER(n)       (GICD_OFFSET + 0x100u + (n) * 4u)
#define GICD_ICENABLER(n)       (GICD_OFFSET + 0x180u + (n) * 4u)
#define GICD_ISPENDR(n)         (GICD_OFFSET + 0x200u + (n) * 4u)
#define GICD_ICPENDR(n)         (GICD_OFFSET + 0x280u + (n) * 4u)
#define GICD_ISACTIVER(n)       (GICD_OFFSET + 0x300u + (n) * 4u)
#define GICD_ICACTIVER(n)       (GICD_OFFSET + 0x380u + (n) * 4u)
#define GICD_IPRIORITYR(n)      (GICD_OFFSET + 0x420u + (n) * 4u)
#define GICD_ITARGETSR(n)       (GICD_OFFSET + 0x800u + (n) * 4u)
#define GICD_ICFGR(n)           (GICD_OFFSET + 0xc00u + (n) * 4u)

GIC V3配置：

// Check whether GICv3 system registers are available
mrc p15, 0, r7, c0, c1, 1   @ ID_PFR1
ubfx    r7, r7, #28, #4
cmp r7, #1
bne 2f

// Enable system register accesses
mrc p15, 4, r7, c12, c9, 5  @ ICC_HSRE
orr r7, r7, #( (1 << 0) | (1 << 3))
mcr p15, 4, r7, c12, c9, 5  @ ICC_HSRE
isb

// SRE bit could be forced to 0 by firmware.
// Check whether it sticks before accessing any other sysreg
mrc p15, 4, r7, c12, c9, 5  @ ICC_HSRE
tst r7, #ICC_SRE_EL2_SRE
beq 2f
mov r7, #0
mcr p15, 4, r7, c12, c11, 0 @ ICH_HCR
2:
mov R0, #0x1
MRC p15, 0, R0, c12, c12, 6
orr r0, r0, #0x1
MCR p15, 0, R0, c12, c12, 6 // Group 0 Enable
MRC p15, 0, R0, c12, c12, 7
orr r0, r0, #0x1
MCR p15, 0, R0, c12, c12, 7 // Group 1 Enable

Answer 1

经过几天的搜索和尝试，我发现它是ARM Kite处理器本身的问题。 ARM已发布未经测试以开始为合作伙伴公司开发。

悲伤听到这个

ARM GIC v3配置使用GICR_寄存器

1 个答案: