From cdf029471736f43776452930b7195a06ab143654 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sat, 17 Apr 2021 22:59:57 +0200
Subject: Added I/O bus implementation for efficient IPC

This was a nice coding session. See ya tomorrow!
---
 libs/libc/crypto.c     | 13 +++++++++++++
 libs/libc/inc/crypto.h |  4 ++++
 libs/libc/inc/sys.h    |  7 ++++++-
 libs/libc/sys.c        |  2 +-
 4 files changed, 24 insertions(+), 2 deletions(-)

(limited to 'libs')

diff --git a/libs/libc/crypto.c b/libs/libc/crypto.c
index 310931d..c2d51ba 100644
--- a/libs/libc/crypto.c
+++ b/libs/libc/crypto.c
@@ -164,3 +164,16 @@ u32 crc32(u32 crc, const void *buf, u32 size)
 
 	return crc ^ ~0UL;
 }
+
+#ifdef KERNEL
+
+#include <cpu.h>
+u32 crc32_user(u32 crc, const void *buf, u32 size)
+{
+	stac();
+	u32 ret = crc32(crc, buf, size);
+	clac();
+	return ret;
+}
+
+#endif
diff --git a/libs/libc/inc/crypto.h b/libs/libc/inc/crypto.h
index 16cdf86..b672c50 100644
--- a/libs/libc/inc/crypto.h
+++ b/libs/libc/inc/crypto.h
@@ -8,4 +8,8 @@
 void md5(const void *initial_msg, u32 initial_len, u8 digest[16]) NONNULL;
 u32 crc32(u32 crc, const void *buf, u32 size) NONNULL;
 
+#ifdef KERNEL
+u32 crc32_user(u32 crc, const void *buf, u32 size) NONNULL;
+#endif
+
 #endif
diff --git a/libs/libc/inc/sys.h b/libs/libc/inc/sys.h
index 461db2e..72a8029 100644
--- a/libs/libc/inc/sys.h
+++ b/libs/libc/inc/sys.h
@@ -42,6 +42,11 @@ enum io_type {
 	IO_MAX,
 };
 
+// I/O control declarations
+#define IOCTL_FB_GET 0
+#define IOCTL_BUS_CONNECT 0
+#define IOCTL_BUS_REGISTER 1
+
 struct event_keyboard {
 	u32 magic;
 	u32 scancode;
@@ -77,7 +82,7 @@ res write(const char *path, const void *buf, u32 offset, u32 count) NONNULL;
 res stat(const char *path, struct stat *buf) NONNULL;
 res exec(const char *path, ...) ATTR((nonnull(1))) SENTINEL;
 
-res io_poll(u32 *devs) NONNULL;
+res io_poll(enum io_type *devs) NONNULL;
 res io_read(enum io_type io, void *buf, u32 offset, u32 count) NONNULL;
 res io_write(enum io_type io, void *buf, u32 offset, u32 count) NONNULL;
 res io_control(enum io_type io, ...);
diff --git a/libs/libc/sys.c b/libs/libc/sys.c
index 3161d72..b0e6e93 100644
--- a/libs/libc/sys.c
+++ b/libs/libc/sys.c
@@ -128,7 +128,7 @@ res exec(const char *path, ...)
 	return sys5(SYS_EXEC, (int)path, args[0], args[1], args[2], args[3]);
 }
 
-res io_poll(u32 *devs)
+res io_poll(enum io_type *devs)
 {
 	return sys1(SYS_IOPOLL, (int)devs);
 }
-- 
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