arch/ppc/boot/simple/misc-ev64260.c

   1 /*
   2  * Host bridge init code for the Marvell/Galileo EV-64260-BP evaluation board
   3  * with a GT64260 onboard.
   4  *
   5  * Author: Mark A. Greer <mgreer@mvista.com>
   6  *
   7  * 2001 (c) MontaVista Software, Inc. This file is licensed under
   8  * the terms of the GNU General Public License version 2. This program
   9  * is licensed "as is" without any warranty of any kind, whether express
  10  * or implied.
  11  */
  12
  13 #include <linux/types.h>
  14 #include <asm/reg.h>
  15 #include <asm/io.h>
  16 #include <asm/mv64x60_defs.h>
  17 #include <platforms/ev64260.h>
  18
  19 #ifdef CONFIG_SERIAL_MPSC_CONSOLE
  20 extern u32 mv64x60_console_baud;
  21 extern u32 mv64x60_mpsc_clk_src;
  22 extern u32 mv64x60_mpsc_clk_freq;
  23 #endif
  24
  25 void
  26 mv64x60_board_init(void __iomem *old_base, void __iomem *new_base)
  27 {
  28         u32     p, v;
  29
  30         /* DINK doesn't enable 745x timebase, so enable here (Adrian Cox) */
  31         p = mfspr(SPRN_PVR);
  32         p >>= 16;
  33
  34         /* Reasonable SWAG at a 745x PVR value */
  35         if (((p & 0xfff0) == 0x8000) && (p != 0x800c)) {
  36                 v = mfspr(SPRN_HID0);
  37                 v |= HID0_TBEN;
  38                 mtspr(SPRN_HID0, v);
  39         }
  40
  41 #ifdef CONFIG_SERIAL_8250_CONSOLE
  42         /*
  43          * Change device bus 2 window so that bootoader can do I/O thru
  44          * 8250/16550 UART that's mapped in that window.
  45          */
  46         out_le32(new_base + MV64x60_CPU2DEV_2_BASE, EV64260_UART_BASE >> 20);
  47         out_le32(new_base + MV64x60_CPU2DEV_2_SIZE, EV64260_UART_END >> 20);
  48         __asm__ __volatile__("sync");
  49 #elif defined(CONFIG_SERIAL_MPSC_CONSOLE)
  50         mv64x60_console_baud = EV64260_DEFAULT_BAUD;
  51         mv64x60_mpsc_clk_src = EV64260_MPSC_CLK_SRC;
  52         mv64x60_mpsc_clk_freq = EV64260_MPSC_CLK_FREQ;
  53 #endif
  54 }