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https://github.com/drasko/codezero.git
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cab2e8bdd3
Finished adding untested shm syscalls. Finished adding untested l4 send/recv helpers Everything compiles. Now going to fix lots of bugs ;-)
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/*
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* High-level block device handling.
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*
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* Copyright (C) 2007, 2008 Bahadir Balban
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*/
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#include <stdio.h>
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#include <blkdev.h>
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/*
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* Handles block device requests from fs0 using a combination of
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* server-specific and posix shm semantics
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*/
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void handle_block_device_request()
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{
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u32 mr[MR_UNUSED_TOTAL];
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l4id_t sender;
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int err;
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u32 tag;
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printf("%s: Listening requests.\n", __TASKNAME__);
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if ((err = l4_receive(L4_ANYTHREAD)) < 0) {
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printf("%s: %s: IPC Error: %d. Quitting...\n", __TASKNAME__,
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__FUNCTION__, err);
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BUG();
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}
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/* Read conventional ipc data */
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tag = l4_get_tag();
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sender = l4_get_sender();
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/* Read mrs not used by syslib */
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for (int i = 0; i < MR_UNUSED_TOTAL; i++)
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mr[i] = read_mr(i);
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switch(tag) {
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case L4_IPC_TAG_WAIT:
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printf("%s: Synced with waiting thread.\n", __TASKNAME__);
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break;
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case L4_IPC_TAG_BLOCK_OPEN:
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sys_open(sender, (void *)mr[0], (int)mr[1], (u32)mr[2]);
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break;
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default:
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printf("%s: Unrecognised ipc tag (%d)"
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"received. Ignoring.\n", __TASKNAME__, mr[MR_TAG]);
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}
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}
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int main(void)
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{
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/* Initialise the block devices */
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init_blkdev();
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while (1) {
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handle_block_device_request();
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}
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return 0;
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}
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