diff options
| -rw-r--r-- | sv/soc/irq/pimc.sv | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/sv/soc/irq/pimc.sv b/sv/soc/irq/pimc.sv index 43d7637..a41a941 100644 --- a/sv/soc/irq/pimc.sv +++ b/sv/soc/irq/pimc.sv @@ -34,7 +34,8 @@ module pimc #( parameter IRQ_PIN_COUNT = 16, - parameter IRQTAB_ENTSIZE = 9, + parameter IRQTAB_ENTSIZE = 32, + parameter IRQTAB_MMIOBASE = 48'h1000, /* irqtab indices */ parameter IRQTAB_MASK = 1 @@ -42,23 +43,53 @@ module pimc #( input wire clk, /* 50 MHz */ input logic [IRQ_PIN_COUNT-1:0] irq_in, input logic irqack, + + /* MMIO interface */ + input logic [47:0] mmio_addr, + output logic [31:0] mmio_rdata, + input wire mmio_re, + output logic notify, output logic [7:0] lineno, output logic [7:0] processor_id ); integer i; - bit irqmask; bit accept; - reg [IRQTAB_ENTSIZE - 1:0] irqtab[IRQ_PIN_COUNT - 1]; + bit irqmask; + reg [IRQTAB_ENTSIZE - 1:0] irqtab[IRQ_PIN_COUNT]; initial begin for (i = 0; i < IRQ_PIN_COUNT; i = i + IRQTAB_ENTSIZE) begin - irqtab[i] = 9'b0; + irqtab[i] = 32'b0; end + + mmio_rdata = 32'b0; end always @(posedge clk) begin + /* Handle MMIO reads */ + if (mmio_re) begin + case (mmio_addr) + IRQTAB_MMIOBASE: mmio_rdata <= irqtab[0]; + IRQTAB_MMIOBASE + 4: mmio_rdata <= irqtab[1]; + IRQTAB_MMIOBASE + 8: mmio_rdata <= irqtab[2]; + IRQTAB_MMIOBASE + 12: mmio_rdata <= irqtab[3]; + IRQTAB_MMIOBASE + 16: mmio_rdata <= irqtab[4]; + IRQTAB_MMIOBASE + 20: mmio_rdata <= irqtab[5]; + IRQTAB_MMIOBASE + 24: mmio_rdata <= irqtab[6]; + IRQTAB_MMIOBASE + 28: mmio_rdata <= irqtab[7]; + IRQTAB_MMIOBASE + 32: mmio_rdata <= irqtab[8]; + IRQTAB_MMIOBASE + 36: mmio_rdata <= irqtab[9]; + IRQTAB_MMIOBASE + 40: mmio_rdata <= irqtab[10]; + IRQTAB_MMIOBASE + 44: mmio_rdata <= irqtab[11]; + IRQTAB_MMIOBASE + 48: mmio_rdata <= irqtab[12]; + IRQTAB_MMIOBASE + 52: mmio_rdata <= irqtab[13]; + IRQTAB_MMIOBASE + 56: mmio_rdata <= irqtab[14]; + IRQTAB_MMIOBASE + 60: mmio_rdata <= irqtab[15]; + endcase + end + if (irqack == 1'b1) begin lineno <= 8'b0; notify <= 1'b1; |