arch/arm/mach-davinci/include/mach/uncompress.h

   1 /*
   2  * Serial port stubs for kernel decompress status messages
   3  *
   4  * Initially based on:
   5  * arch/arm/plat-omap/include/mach/uncompress.h
   6  *
   7  * Original copyrights follow.
   8  *
   9  * Copyright (C) 2000 RidgeRun, Inc.
  10  * Author: Greg Lonnon <glonnon@ridgerun.com>
  11  *
  12  * Rewritten by:
  13  * Author: <source@mvista.com>
  14  * 2004 (c) MontaVista Software, Inc.
  15  *
  16  * This file is licensed under the terms of the GNU General Public License
  17  * version 2. This program is licensed "as is" without any warranty of any
  18  * kind, whether express or implied.
  19  */
  20
  21 #include <linux/types.h>
  22 #include <linux/serial_reg.h>
  23
  24 #include <asm/mach-types.h>
  25
  26 #include <mach/serial.h>
  27
  28 u32 *uart;
  29
  30 /* PORT_16C550A, in polled non-fifo mode */
  31 static void putc(char c)
  32 {
  33         while (!(uart[UART_LSR] & UART_LSR_THRE))
  34                 barrier();
  35         uart[UART_TX] = c;
  36 }
  37
  38 static inline void flush(void)
  39 {
  40         while (!(uart[UART_LSR] & UART_LSR_THRE))
  41                 barrier();
  42 }
  43
  44 static inline void set_uart_info(u32 phys, void * __iomem virt)
  45 {
  46         /*
  47          * Get address of some.bss variable and round it down
  48          * a la CONFIG_AUTO_ZRELADDR.
  49          */
  50         u32 ram_start = (u32)&uart & 0xf8000000;
  51         u32 *uart_info = (u32 *)(ram_start + DAVINCI_UART_INFO_OFS);
  52
  53         uart = (u32 *)phys;
  54         uart_info[0] = phys;
  55         uart_info[1] = (u32)virt;
  56 }
  57
  58 #define _DEBUG_LL_ENTRY(machine, phys, virt)                    \
  59         if (machine_is_##machine()) {                           \
  60                 set_uart_info(phys, virt);                      \
  61                 break;                                          \
  62         }
  63
  64 #define DEBUG_LL_DAVINCI(machine, port)                         \
  65         _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE,     \
  66                         IO_ADDRESS(DAVINCI_UART##port##_BASE))
  67
  68 #define DEBUG_LL_DA8XX(machine, port)                           \
  69         _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE,       \
  70                         IO_ADDRESS(DA8XX_UART##port##_BASE))
  71
  72 #define DEBUG_LL_TNETV107X(machine, port)                       \
  73         _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE,   \
  74                         TNETV107X_UART##port##_VIRT)
  75
  76 static inline void __arch_decomp_setup(unsigned long arch_id)
  77 {
  78         /*
  79          * Initialize the port based on the machine ID from the bootloader.
  80          * Note that we're using macros here instead of switch statement
  81          * as machine_is functions are optimized out for the boards that
  82          * are not selected.
  83          */
  84         do {
  85                 /* Davinci boards */
  86                 DEBUG_LL_DAVINCI(davinci_evm,           0);
  87                 DEBUG_LL_DAVINCI(sffsdr,                0);
  88                 DEBUG_LL_DAVINCI(neuros_osd2,           0);
  89                 DEBUG_LL_DAVINCI(davinci_dm355_evm,     0);
  90                 DEBUG_LL_DAVINCI(dm355_leopard,         0);
  91                 DEBUG_LL_DAVINCI(davinci_dm6467_evm,    0);
  92                 DEBUG_LL_DAVINCI(davinci_dm365_evm,     0);
  93
  94                 /* DA8xx boards */
  95                 DEBUG_LL_DA8XX(davinci_da830_evm,       2);
  96                 DEBUG_LL_DA8XX(davinci_da850_evm,       2);
  97                 DEBUG_LL_DA8XX(mityomapl138,            1);
  98                 DEBUG_LL_DA8XX(omapl138_hawkboard,      2);
  99
 100                 /* TNETV107x boards */
 101                 DEBUG_LL_TNETV107X(tnetv107x,           1);
 102         } while (0);
 103 }
 104
 105 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
 106 #define arch_decomp_wdog()