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

   1 /*
   2  * arch/ppc/boot/simple/misc-ev64260.c
   3  *
   4  * Host bridge init code for the Marvell/Galileo EV-64260-BP evaluation board
   5  * with a GT64260 onboard.
   6  *
   7  * Author: Mark A. Greer <mgreer@mvista.com>
   8  *
   9  * 2001 (c) MontaVista Software, Inc. This file is licensed under
  10  * the terms of the GNU General Public License version 2. This program
  11  * is licensed "as is" without any warranty of any kind, whether express
  12  * or implied.
  13  */
  14
  15 #include <linux/config.h>
  16 #include <linux/types.h>
  17 #include <asm/reg.h>
  18 #include <asm/io.h>
  19 #include <asm/mv64x60_defs.h>
  20 #include <platforms/ev64260.h>
  21
  22 #ifdef CONFIG_SERIAL_MPSC_CONSOLE
  23 extern u32 mv64x60_console_baud;
  24 extern u32 mv64x60_mpsc_clk_src;
  25 extern u32 mv64x60_mpsc_clk_freq;
  26 #endif
  27
  28 void
  29 mv64x60_board_init(void __iomem *old_base, void __iomem *new_base)
  30 {
  31         u32     p, v;
  32
  33         /* DINK doesn't enable 745x timebase, so enable here (Adrian Cox) */
  34         p = mfspr(SPRN_PVR);
  35         p >>= 16;
  36
  37         /* Reasonable SWAG at a 745x PVR value */
  38         if (((p & 0xfff0) == 0x8000) && (p != 0x800c)) {
  39                 v = mfspr(SPRN_HID0);
  40                 v |= HID0_TBEN;
  41                 mtspr(SPRN_HID0, v);
  42         }
  43
  44 #ifdef CONFIG_SERIAL_8250_CONSOLE
  45         /*
  46          * Change device bus 2 window so that bootoader can do I/O thru
  47          * 8250/16550 UART that's mapped in that window.
  48          */
  49         out_le32(new_base + MV64x60_CPU2DEV_2_BASE, EV64260_UART_BASE >> 20);
  50         out_le32(new_base + MV64x60_CPU2DEV_2_SIZE, EV64260_UART_END >> 20);
  51         __asm__ __volatile__("sync");
  52 #elif defined(CONFIG_SERIAL_MPSC_CONSOLE)
  53         mv64x60_console_baud = EV64260_DEFAULT_BAUD;
  54         mv64x60_mpsc_clk_src = EV64260_MPSC_CLK_SRC;
  55         mv64x60_mpsc_clk_freq = EV64260_MPSC_CLK_FREQ;
  56 #endif
  57 }