qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [RESEND][PATCH] Support epoch of 1980 in RTC emulation for


From: Stuart Brady
Subject: [Qemu-devel] [RESEND][PATCH] Support epoch of 1980 in RTC emulation for MIPS Magnum
Date: Sun, 18 Jan 2009 13:51:41 +0000
User-agent: Mutt/1.5.13 (2006-08-11)

On the MIPS Magnum, the time that is held in the RTC's NVRAM should be
relative to midnight on 1980-01-01.  This patch adds an extra parameter
to rtc_init(), allowing different epochs to be used.  For the Magnum,
1980 is specified, and for all other machines, 2000 is specified.

I've not modified the handling of the century byte, as with an epoch of
1980 and a year of 2009, one could argue that it should hold either
0, 1, 19 or 20.  NT 3.50 on MIPS does not read the century byte.

Signed-off-by: Stuart Brady <address@hidden>

Index: hw/ppc_prep.c
===================================================================
--- hw/ppc_prep.c       (revision 6360)
+++ hw/ppc_prep.c       (working copy)
@@ -659,7 +659,7 @@
                  vga_ram_size, 0, 0);
     //    openpic = openpic_init(0x00000000, 0xF0000000, 1);
     //    pit = pit_init(0x40, i8259[0]);
-    rtc_init(0x70, i8259[8]);
+    rtc_init(0x70, i8259[8], 2000);
 
     serial_init(0x3f8, i8259[4], 115200, serial_hds[0]);
     nb_nics1 = nb_nics;
Index: hw/mc146818rtc.c
===================================================================
--- hw/mc146818rtc.c    (revision 6360)
+++ hw/mc146818rtc.c    (working copy)
@@ -60,6 +60,7 @@
     uint8_t cmos_data[128];
     uint8_t cmos_index;
     struct tm current_tm;
+    int base_year;
     qemu_irq irq;
     int it_shift;
     /* periodic timer */
@@ -235,7 +236,7 @@
     tm->tm_wday = from_bcd(s, s->cmos_data[RTC_DAY_OF_WEEK]) - 1;
     tm->tm_mday = from_bcd(s, s->cmos_data[RTC_DAY_OF_MONTH]);
     tm->tm_mon = from_bcd(s, s->cmos_data[RTC_MONTH]) - 1;
-    tm->tm_year = from_bcd(s, s->cmos_data[RTC_YEAR]) + 100;
+    tm->tm_year = from_bcd(s, s->cmos_data[RTC_YEAR]) + s->base_year - 1900;
 }
 
 static void rtc_copy_date(RTCState *s)
@@ -256,7 +257,8 @@
     s->cmos_data[RTC_DAY_OF_WEEK] = to_bcd(s, tm->tm_wday + 1);
     s->cmos_data[RTC_DAY_OF_MONTH] = to_bcd(s, tm->tm_mday);
     s->cmos_data[RTC_MONTH] = to_bcd(s, tm->tm_mon + 1);
-    s->cmos_data[RTC_YEAR] = to_bcd(s, tm->tm_year % 100);
+    s->cmos_data[RTC_YEAR] = to_bcd(s, (tm->tm_year + 10000 - s->base_year)
+                                       % 100);
 }
 
 /* month is between 0 and 11. */
@@ -522,7 +524,7 @@
 }
 #endif
 
-RTCState *rtc_init(int base, qemu_irq irq)
+RTCState *rtc_init(int base, qemu_irq irq, int base_year)
 {
     RTCState *s;
 
@@ -536,6 +538,7 @@
     s->cmos_data[RTC_REG_C] = 0x00;
     s->cmos_data[RTC_REG_D] = 0x80;
 
+    s->base_year = base_year;
     rtc_set_date_from_host(s);
 
     s->periodic_timer = qemu_new_timer(vm_clock,
@@ -631,7 +634,8 @@
     &cmos_mm_writel,
 };
 
-RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq)
+RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq,
+                      int base_year)
 {
     RTCState *s;
     int io_memory;
@@ -646,6 +650,7 @@
     s->cmos_data[RTC_REG_C] = 0x00;
     s->cmos_data[RTC_REG_D] = 0x80;
 
+    s->base_year = base_year;
     rtc_set_date_from_host(s);
 
     s->periodic_timer = qemu_new_timer(vm_clock,
Index: hw/mips_jazz.c
===================================================================
--- hw/mips_jazz.c      (revision 6360)
+++ hw/mips_jazz.c      (working copy)
@@ -241,7 +241,7 @@
     fdctrl_init(rc4030[1], 0, 1, 0x80003000, fds);
 
     /* Real time clock */
-    rtc_init(0x70, i8259[8]);
+    rtc_init(0x70, i8259[8], 1980);
     s_rtc = cpu_register_io_memory(0, rtc_read, rtc_write, env);
     cpu_register_physical_memory(0x80004000, 0x00001000, s_rtc);
 
Index: hw/mips_malta.c
===================================================================
--- hw/mips_malta.c     (revision 6360)
+++ hw/mips_malta.c     (working copy)
@@ -913,7 +913,7 @@
 
     /* Super I/O */
     i8042_init(i8259[1], i8259[12], 0x60);
-    rtc_state = rtc_init(0x70, i8259[8]);
+    rtc_state = rtc_init(0x70, i8259[8], 2000);
     if (serial_hds[0])
         serial_init(0x3f8, i8259[4], 115200, serial_hds[0]);
     if (serial_hds[1])
Index: hw/pc.c
===================================================================
--- hw/pc.c     (revision 6360)
+++ hw/pc.c     (working copy)
@@ -968,7 +968,7 @@
         }
     }
 
-    rtc_state = rtc_init(0x70, i8259[8]);
+    rtc_state = rtc_init(0x70, i8259[8], 2000);
 
     qemu_register_boot_set(pc_boot_set, rtc_state);
 
Index: hw/pc.h
===================================================================
--- hw/pc.h     (revision 6360)
+++ hw/pc.h     (working copy)
@@ -83,8 +83,9 @@
 
 typedef struct RTCState RTCState;
 
-RTCState *rtc_init(int base, qemu_irq irq);
-RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq);
+RTCState *rtc_init(int base, qemu_irq irq, int base_year);
+RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq,
+                      int base_year);
 void rtc_set_memory(RTCState *s, int addr, int val);
 void rtc_set_date(RTCState *s, const struct tm *tm);
 void cmos_set_s3_resume(void);
Index: hw/mips_r4k.c
===================================================================
--- hw/mips_r4k.c       (revision 6360)
+++ hw/mips_r4k.c       (working copy)
@@ -229,7 +229,7 @@
     /* The PIC is attached to the MIPS CPU INT0 pin */
     i8259 = i8259_init(env->irq[2]);
 
-    rtc_state = rtc_init(0x70, i8259[8]);
+    rtc_state = rtc_init(0x70, i8259[8], 2000);
 
     /* Register 64 KB of ISA IO space at 0x14000000 */
     isa_mmio_init(0x14000000, 0x00010000);
-- 
Stuart Brady




reply via email to

[Prev in Thread] Current Thread [Next in Thread]