X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/fef29e9e993e62f025d8cbfeb6b8d51588083b7e..4f966b9a6710d138d6e921bf2a1e40f2abc76f9a:/lunaix-os/hal/apic.c

diff --git a/lunaix-os/hal/apic.c b/lunaix-os/hal/apic.c
index 32bfed5..0099525 100644
--- a/lunaix-os/hal/apic.c
+++ b/lunaix-os/hal/apic.c
@@ -15,13 +15,13 @@
 
 #include <arch/x86/interrupts.h>
 
+#include <lunaix/mm/mmio.h>
 #include <lunaix/spike.h>
 #include <lunaix/syslog.h>
 
 LOG_MODULE("APIC")
 
-void
-apic_setup_timer();
+static volatile uintptr_t _apic_base;
 
 void
 apic_setup_lvts();
@@ -39,53 +39,55 @@ apic_init()
     // As we are going to use APIC, disable the old 8259 PIC
     pic_disable();
 
+    _apic_base = ioremap(__APIC_BASE_PADDR, 4096);
+
     // Hardware enable the APIC
     // By setting bit 11 of IA32_APIC_BASE register
-    // Note: After this point, you can't disable then re-enable it until a reset (i.e., reboot)
-    asm volatile (
-        "movl %0, %%ecx\n"
-        "rdmsr\n"
-        "orl %1, %%eax\n"
-        "wrmsr\n"
-        ::"i"(IA32_APIC_BASE_MSR), "i"(IA32_APIC_ENABLE)
-        : "eax", "ecx", "edx"
-    );
+    // Note: After this point, you can't disable then re-enable it until a
+    // reset (i.e., reboot)
+    asm volatile("movl %0, %%ecx\n"
+                 "rdmsr\n"
+                 "orl %1, %%eax\n"
+                 "wrmsr\n" ::"i"(IA32_MSR_APIC_BASE),
+                 "i"(IA32_APIC_ENABLE)
+                 : "eax", "ecx", "edx");
 
     // Print the basic information of our current local APIC
     uint32_t apic_id = apic_read_reg(APIC_IDR) >> 24;
     uint32_t apic_ver = apic_read_reg(APIC_VER);
 
     kprintf(KINFO "ID: %x, Version: %x, Max LVT: %u\n",
-           apic_id,
-           apic_ver & 0xff,
-           (apic_ver >> 16) & 0xff);
+            apic_id,
+            apic_ver & 0xff,
+            (apic_ver >> 16) & 0xff);
 
     // initialize the local vector table (LVT)
     apic_setup_lvts();
 
     // initialize priority registers
-    
-    // set the task priority to the lowest possible, so all external interrupts are acceptable
-    //   Note, the lowest possible priority class is 2, not 0, 1, as they are reserved for
-    //   internal interrupts (vector 0-31, and each p-class resposible for 16 vectors). 
-    //   See Intel Manual Vol. 3A, 10-29
+
+    // set the task priority to the lowest possible, so all external interrupts
+    // are acceptable
+    //   Note, the lowest possible priority class is 2, not 0, 1, as they are
+    //   reserved for internal interrupts (vector 0-31, and each p-class
+    //   resposible for 16 vectors). See Intel Manual Vol. 3A, 10-29
     apic_write_reg(APIC_TPR, APIC_PRIORITY(2, 0));
 
     // enable APIC
     uint32_t spiv = apic_read_reg(APIC_SPIVR);
 
     // install our handler for spurious interrupt.
-    spiv = (spiv & ~0xff) | APIC_SPIV_APIC_ENABLE  | APIC_SPIV_IV;
+    spiv = (spiv & ~0xff) | APIC_SPIV_APIC_ENABLE | APIC_SPIV_IV;
     apic_write_reg(APIC_SPIVR, spiv);
 }
 
-#define LVT_ENTRY_LINT0(vector)           (LVT_DELIVERY_FIXED | vector)
+#define LVT_ENTRY_LINT0(vector) (LVT_DELIVERY_FIXED | vector)
 
 // Pin LINT#1 is configured for relaying NMI, but we masked it here as I think
 //  it is too early for that
 // LINT#1 *must* be edge trigged (Intel manual vol3. 10-14)
-#define LVT_ENTRY_LINT1                   (LVT_DELIVERY_NMI | LVT_MASKED | LVT_TRIGGER_EDGE)
-#define LVT_ENTRY_ERROR(vector)           (LVT_DELIVERY_FIXED | vector)
+#define LVT_ENTRY_LINT1 (LVT_DELIVERY_NMI | LVT_MASKED | LVT_TRIGGER_EDGE)
+#define LVT_ENTRY_ERROR(vector) (LVT_DELIVERY_FIXED | vector)
 
 void
 apic_setup_lvts()
@@ -94,3 +96,21 @@ apic_setup_lvts()
     apic_write_reg(APIC_LVT_LINT1, LVT_ENTRY_LINT1);
     apic_write_reg(APIC_LVT_ERROR, LVT_ENTRY_ERROR(APIC_ERROR_IV));
 }
+
+void
+apic_done_servicing()
+{
+    *(unsigned int*)(_apic_base + APIC_EOI) = 0;
+}
+
+unsigned int
+apic_read_reg(unsigned int reg)
+{
+    return *(unsigned int*)(_apic_base + (reg));
+}
+
+void
+apic_write_reg(unsigned int reg, unsigned int val)
+{
+    *(unsigned int*)(_apic_base + reg) = val;
+}
\ No newline at end of file