Remove make preinstall

A speciality of the RTEMS build system was the make preinstall step.  It
copied header files from arbitrary locations into the build tree.  The
header files were included via the -Bsome/build/tree/path GCC command
line option.

This has at least seven problems:

* The make preinstall step itself needs time and disk space.

* Errors in header files show up in the build tree copy.  This makes it
  hard for editors to open the right file to fix the error.

* There is no clear relationship between source and build tree header
  files.  This makes an audit of the build process difficult.

* The visibility of all header files in the build tree makes it
  difficult to enforce API barriers.  For example it is discouraged to
  use BSP-specifics in the cpukit.

* An introduction of a new build system is difficult.

* Include paths specified by the -B option are system headers.  This
  may suppress warnings.

* The parallel build had sporadic failures on some hosts.

This patch removes the make preinstall step.   All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc.  Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.

The new cpukit include directories are:

* cpukit/include

* cpukit/score/cpu/@RTEMS_CPU@/include

* cpukit/libnetworking

The new BSP include directories are:

* bsps/include

* bsps/@RTEMS_CPU@/include

* bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include

There are build tree include directories for generated files.

The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.

The "bootstrap -p" option was removed.  The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.

Update #3254.

1 files changed, 178 insertions, 0 deletions

diff --git a/bsps/arm/beagle/include/bsp/bbb-pwm.h b/bsps/arm/beagle/include/bsp/bbb-pwm.h
new file mode 100644
index 0000000000..cf5d6fe552
--- /dev/null
+++ b/bsps/arm/beagle/include/bsp/bbb-pwm.h
@@ -0,0 +1,178 @@
+/**
+ * @file
+ *
+ * @ingroup arm_beagle
+ *
+ * @brief BeagleBone Black PWM support definitions.
+ */
+
+/**
+ * Copyright (c) 2016 Punit Vara <punitvara@gmail.com>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+/** Some constants are taken from 
+ * https://github.com/VegetableAvenger/BBBIOlib/blob/master/BBBio_lib/BBBiolib_PWMSS.h
+ */
+
+#ifndef LIBBSP_ARM_BEAGLE_BBB_PWM_H
+#define LIBBSP_ARM_BEAGLE_BBB_PWM_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @brief  BeagleBone Black PWM Macros.
+ */
+#define BBB_CONTROL_CONF_GPMC_AD(n)   (0x800 + (n * 4))
+#define BBB_CONTROL_CONF_LCD_DATA(n)   (0x8a0 + (n * 4))
+
+/**
+ * @brief The set of possible PWM subsystem module
+ *
+ * Enumerated type to define various instance of pwm module.
+ */
+typedef enum{
+  BBB_PWMSS0 = 0,
+  BBB_PWMSS1,
+  BBB_PWMSS2,
+  BBB_PWMSS_COUNT
+}BBB_PWMSS;
+
+typedef enum{
+  BBB_P8_13_2B = 3,
+  BBB_P8_19_2A,
+  BBB_P8_45_2A,
+  BBB_P8_46_2B,
+  BBB_P8_34_1B,
+  BBB_P8_36_1A,
+  BBB_P9_14_1A,
+  BBB_P9_16_1B,
+  BBB_P9_21_0B,
+  BBB_P9_22_0A,
+  BBB_P9_29_0B,
+  BBB_P9_31_0A
+}bbb_pwm_pin_t;
+
+#define BBB_P8_13_MUX_PWM 4 
+#define BBB_P8_19_MUX_PWM 4
+#define BBB_P8_45_MUX_PWM 3
+#define BBB_P8_46_MUX_PWM 3
+#define BBB_P8_34_MUX_PWM 2
+#define BBB_P8_36_MUX_PWM 2
+#define BBB_P9_14_MUX_PWM 6
+#define BBB_P9_16_MUX_PWM 6
+#define BBB_P9_21_MUX_PWM 3
+#define BBB_P9_22_MUX_PWM 3
+#define BBB_P9_29_MUX_PWM 1
+#define BBB_P9_31_MUX_PWM 1
+#define BBB_PWM_FREQ_THRESHOLD 0.5f
+
+/**
+ * @brief  BeagleBone Black PWM API.
+ */
+
+/**
+ * @brief This function intilizes clock for pwm sub system.
+ *
+ * @param PWMSS_ID It is the instance number of EPWM of pwm sub system.
+ * 
+ * @return true if successful 
+ * @return false if not successful
+ *
+ **/
+bool beagle_pwm_init(BBB_PWMSS pwmss_id);
+
+/* PWMSS setting
+ *      set pulse argument of epwm module
+ *
+ *      @param pwm_id    : EPWMSS number , 0~2
+ *      @param pwm_freq : frequency to be generated
+ *      @param dutyA    : Duty Cycle(in percentage) in PWM channel A
+ *      @param dutyB    : Duty Cycle(in percentage) in PWM channel B
+ *
+ *      @return         : 1 for success
+ *      @return         : 0 for failed
+ *
+ *      @example        :  beagle_pwm_configure(0 , 50.0f , 50.0f , 25.0f);      // Generate 50HZ pwm in PWM0 ,
+ *                                                                              // duty cycle is 50% for ePWM0A , 25% for ePWM0B
+ *
+ *      @Note :
+ *              find an number nearst 65535 for TBPRD , to improve duty precision,
+ *
+ *              Using big TBPRD can increase the range of CMPA and CMPB ,
+ *              and it means we can get better precision on duty cycle.
+ *
+ *              EX : 20.25% duty cycle
+ *                  on TBPRD = 62500 , CMPA = 12656.25 ( .25 rejection) , real duty : 20.2496% (12656 /62500)
+ *                  on TBPRD = 6250  , CMPA = 1265.625 ( .625 rejection), real duty : 20.24%   (1265 6250)
+ *                  on TBPRD = 500   , CMPA = 101.25   ( .25 rejection) , real duty : 20.2%    (101/500)
+ *
+ *              Divisor = CLKDIV * HSPCLKDIV
+ *                      1 TBPRD : 10 ns (default)
+ *                      65535 TBPRD : 655350 ns
+ *                      65535 TBPRD : 655350 * Divisor ns  = X TBPRD : Cycle
+ *
+ *              accrooding to that , we must find a Divisor value , let X nearest 65535 .
+ *              so , Divisor must  Nearest Cycle/655350
+ */
+int beagle_pwm_configure(BBB_PWMSS pwm_id, float pwm_freq, float duty_a, float duty_b);
+
+/**
+ * @brief   This API enables the particular PWM module.
+ *
+ * @param   pwmid  It is the instance number of EPWM of pwm sub system.
+ *
+ * @return  true if successful
+ * @return  false if fail
+ *
+ **/
+bool beagle_pwm_enable(BBB_PWMSS pwmid);
+
+/**
+ * @brief   This API disables the particular PWM module.
+ *
+ * @param   pwmid  It is the instance number of EPWM of pwm sub system.
+ *
+ * @return  true if successful
+ * @return  false if fail
+ *
+ **/
+bool beagle_pwm_disable(BBB_PWMSS pwmid);
+
+/**
+ * @brief   This function enables pinmuxing for PWM module.
+ *
+ * @param   pin_no  It is individual pin at which freuqency need to be generated.
+ *                  It should be according to pwm sub system.
+ *
+ * @param   pwm_id  It is the instance number of EPWM of pwmsubsystem.
+ *
+ * @return  true if successful
+ * @return  false if fail
+ *
+ **/
+bool beagle_pwm_pinmux_setup(bbb_pwm_pin_t pin_no, BBB_PWMSS pwm_id);
+
+/**
+ * @brief   This function determines whether PWMSS-wide clocks enabled or not.
+ *
+ * @param   pwmss_id  It is the instance number of PWMSS which clocks need to be
+ *                    checked.
+ * 
+ * @return  true if successful
+ * @return  false if fail
+ *
+ **/
+bool beagle_pwmss_is_running(unsigned int pwmss_id);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_BEAGLE_BBB_PWM_H */