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提交 30e53e7a 创建 作者: Silas Boyd-Wickizer's avatar Silas Boyd-Wickizer
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Some XXX on the old xapic code

上级 44d80c8c
隐藏空白字符变更
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正在显示 包含 5 行增加 和 0 行删除
kernel/xapic.cc
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...@@ -25,6 +25,7 @@ ...@@ -25,6 +25,7 @@
#define DEASSERT 0x00000000 #define DEASSERT 0x00000000
#define LEVEL 0x00008000 // Level triggered #define LEVEL 0x00008000 // Level triggered
#define BCAST 0x00080000 // Send to all APICs, including self. #define BCAST 0x00080000 // Send to all APICs, including self.
// XXX(sbw) BUSY and DELIVS?
#define BUSY 0x00001000 #define BUSY 0x00001000
#define FIXED 0x00000000 #define FIXED 0x00000000
#define ICRHI (0x0310/4) // Interrupt Command [63:32] #define ICRHI (0x0310/4) // Interrupt Command [63:32]
...@@ -228,10 +229,14 @@ xapicstartap(hwid hwid, u32 addr) ...@@ -228,10 +229,14 @@ xapicstartap(hwid hwid, u32 addr)
// "Universal startup algorithm." // "Universal startup algorithm."
// Send INIT (level-triggered) interrupt to reset other CPU. // Send INIT (level-triggered) interrupt to reset other CPU.
xapicw(ICRHI, hwid.num<<24); xapicw(ICRHI, hwid.num<<24);
// XXX(sbw) why hwid.num in ICRLO?
xapicw(ICRLO, hwid.num | INIT | LEVEL | ASSERT); xapicw(ICRLO, hwid.num | INIT | LEVEL | ASSERT);
xapicwait(); xapicwait();
microdelay(10000); microdelay(10000);
// XXX(sbw) why hwid.num in ICRLO?
xapicw(ICRLO, hwid.num |INIT | LEVEL); xapicw(ICRLO, hwid.num |INIT | LEVEL);
xapicwait(); xapicwait();
microdelay(10000); // should be 10ms, but too slow in Bochs! microdelay(10000); // should be 10ms, but too slow in Bochs!
......
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