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Allocate memory regions for XHCI

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This commit is contained in:
Josh Holtrop 2025-02-23 20:52:36 -05:00
parent d78669df9c
commit e3f27812ad
1 changed files with 35 additions and 0 deletions
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35
src/hulk/usb/xhci.d
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@ -9,7 +9,9 @@
module hulk.usb.xhci;
import hulk.pci;
import hulk.hurl;
import hulk.hurl.a1;
import hulk.hippo;
import hulk.klog;
import hulk.time;
import hulk.volatile;
@ -358,6 +360,39 @@ struct XHCI
Klog.writefln("XHCI controller failed to initialize");
return;
}
/* Allocate memory for various controller data structures. */
ubyte * page = cast(ubyte *)Hippo.allocate_page();
/* Device Context Index: 2K */
void * device_context_index = page;
/* Device Context: 2K */
void * device_context = &page[2048];
page = cast(ubyte *)Hippo.allocate_page();
/* Input Control Context: 64 bytes */
void * input_control_context = page;
/* Slot Context: 64 bytes */
void * slot_context = &page[64];
/* Endpoint Context: 64 bytes */
void * endpoint_context = &page[128];
/* Stream Context: 16 bytes */
void * stream_context = &page[192];
/* Scratchpad Buffer Array: 248 bytes */
void * scratchpad_buffer_array = &page[256];
/* Stream Array (Linear): 1M */
void * stream_array_linear = Hippo.allocate_aligned_region(1024 * 1024, PAGE_SIZE);
/* Stream Array (Pri/Sec): 4K */
void * stream_array_pri_sec = Hippo.allocate_page();
/* Transfer Ring Segments: 64K */
void * transfer_ring_segments = Hippo.allocate_aligned_region(64 * 1024, 64 * 1024);
/* Command Ring Segments: 64K */
void * command_ring_segments = Hippo.allocate_aligned_region(64 * 1024, 64 * 1024);
/* Event Ring Segments: 64K */
void * event_ring_segments = Hippo.allocate_aligned_region(64 * 1024, 64 * 1024);
/* Event Ring Segment Table: 512K */
void * event_ring_segment_table = Hippo.allocate_aligned_region(512 * 1024, PAGE_SIZE);
/* Scratchpad Buffers: 4K */
void * scratchpad_buffers = Hippo.allocate_page();
/* TODO: write dcbaap. */
/* TODO: write cr_ctrl. */
/+ TODO: