setos

commit d1c677c4eac29920b32eff802a6bbad88dc50634
parent c37dd9abcc01fb7ebbb665d7d689dd164a079199
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Mon,  6 May 2024 14:01:06 +0900

process event ring

Diffstat:
M
sys/src/kernel/main.c
 | 
17
++++++++++++++---

1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/sys/src/kernel/main.c b/sys/src/kernel/main.c
@@ -111,6 +111,7 @@ kernel_main(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
 
 	// setup the command ring.
 	xhc_trb command_ring[16] __attribute__((aligned(64))) = {0};
+	int command_ring_pcs = 1;
 	// set link TRB.
 	command_ring[15].parameter = (uint64) command_ring;
 	command_ring[15].control = 6 << 10; // TRB type: link TRB
@@ -119,6 +120,7 @@ kernel_main(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
 	// setup an event ring.
 	xhc_trb event_ring_segment_table[1] __attribute__((aligned(64))) = {0};
 	xhc_trb event_ring_segment[16] __attribute__((aligned(16))) = {0};
+	int event_ring_ccs = 1;
 	event_ring_segment_table[0].parameter = (uint64) event_ring_segment;
 	event_ring_segment_table[0].status = 16;
 	xhc.runtime->IR[0].ERSTSZ = sizeof(event_ring_segment_table) / sizeof(event_ring_segment_table[0]);
@@ -189,11 +191,20 @@ kernel_main(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
 	cons_printf(&con0, "xHC started\n");
 
 	// read ERDP
-	int trb_ccs = 0;
 	xhc_trb *ERDP = (xhc_trb *) (xhc.runtime->IR[0].ERDP&~0xf);
 	cons_printf(&con0, "ERDP: %x\n", ERDP);
-	cons_printf(&con0, "parameter:\t%x\nstatus:\t%x\ncontrol:\t%x\n",
-		ERDP->parameter, ERDP->status, ERDP->control);
+	cons_printf(&con0, "event_ring_segment: %x\n", event_ring_segment);
+	for (; (ERDP->control&0x1) == event_ring_ccs; ERDP += sizeof(xhc_trb)) {
+		if (ERDP >= event_ring_segment +
+			sizeof(xhc_trb)*event_ring_segment_table[0].status) {
+			ERDP = event_ring_segment;
+			event_ring_ccs = !event_ring_ccs;
+		}
+		ERDP->control = (ERDP->control&0xfffffffe) | !event_ring_ccs;
+		cons_printf(&con0, "parameter:\t%x\nstatus:\t%x\ncontrol:\t%x\n",
+			ERDP->parameter, ERDP->status, ERDP->control);
+	}
+	cons_printf(&con0, "processed event ring\n");
 
 halt:
 	for(;;) { __asm__("hlt"); }