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-rw-r--r--drivers/arm/pl011/pl011.c41
-rw-r--r--drivers/arm/pl011/pl011_console.S175
-rw-r--r--drivers/arm/pl011/pl011_console.c98
3 files changed, 175 insertions, 139 deletions
diff --git a/drivers/arm/pl011/pl011.c b/drivers/arm/pl011/pl011.c
deleted file mode 100644
index e296c23..0000000
--- a/drivers/arm/pl011/pl011.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <assert.h>
-#include <pl011.h>
-
-void pl011_setbaudrate(unsigned long base_addr, unsigned int baudrate)
-{
- unsigned int divisor;
- assert(baudrate);
- divisor = (PL011_CLK_IN_HZ * 4) / baudrate;
- pl011_write_ibrd(base_addr, divisor >> 6);
- pl011_write_fbrd(base_addr, divisor & 0x3F);
-}
diff --git a/drivers/arm/pl011/pl011_console.S b/drivers/arm/pl011/pl011_console.S
new file mode 100644
index 0000000..bf26b6b
--- /dev/null
+++ b/drivers/arm/pl011/pl011_console.S
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <arch.h>
+#include <asm_macros.S>
+#include <pl011.h>
+
+ .globl console_init
+ .globl console_putc
+ .globl console_core_init
+ .globl console_core_putc
+ .globl console_getc
+
+ /*
+ * The console base is in the data section and not in .bss
+ * even though it is zero-init. In particular, this allows
+ * the console functions to start using this variable before
+ * the runtime memory is initialized for images which do not
+ * need to copy the .data section from ROM to RAM.
+ */
+.section .data.console_base ; .align 3
+ console_base: .quad 0x0
+
+ /* ---------------------------------------------
+ * int console_init(unsigned long base_addr)
+ * Function to initialize the console without a
+ * C Runtime to print debug information. It saves
+ * the console base to the data section.
+ * In: x0 - console base address
+ * out: return 1 on success.
+ * Clobber list : x1, x2
+ * ---------------------------------------------
+ */
+func console_init
+ adrp x1, console_base
+ str x0, [x1, :lo12:console_base]
+ b console_core_init
+
+ /* ---------------------------------------------
+ * int console_core_init(unsigned long base_addr)
+ * Function to initialize the console without a
+ * C Runtime to print debug information. This
+ * function will be accessed by console_init and
+ * crash reporting.
+ * In: x0 - console base address
+ * Out: return 1 on success
+ * Clobber list : x1, x2
+ * ---------------------------------------------
+ */
+func console_core_init
+ /* Check the input base address */
+ cbz x0, init_fail
+ /* Program the baudrate */
+#if defined(PL011_INTEGER) && defined(PL011_FRACTIONAL)
+ mov w1, #PL011_INTEGER
+ str w1, [x0, #UARTIBRD]
+ mov w1, #PL011_FRACTIONAL
+ str w1, [x0, #UARTFBRD]
+#else
+.set BRD, ((PL011_CLK_IN_HZ << 2) / PL011_BAUDRATE)
+ /* Write the IBRD */
+ mov w1, #((BRD >> 6) & 0xffff)
+.if BRD>=0x400000
+ movk w1, #(BRD >> 22), LSL #16
+.endif
+ str w1, [x0, #UARTIBRD]
+ /* Write the FBRD */
+ mov w1, #(BRD & 0x3f)
+ str w1, [x0, #UARTFBRD]
+#endif
+ mov w1, #PL011_LINE_CONTROL
+ str w1, [x0, #UARTLCR_H]
+ /* Clear any pending errors */
+ str wzr, [x0, #UARTECR]
+ /* Enable tx, rx, and uart overall */
+ mov w1, #(PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN)
+ str w1, [x0, #UARTCR]
+ mov w0, #1
+init_fail:
+ ret
+
+ /* ---------------------------------------------
+ * int console_putc(int c)
+ * Function to output a character over the
+ * console. It returns the character printed on
+ * success or -1 on error.
+ * In : x0 - character to be printed
+ * Out : return -1 on error else return character.
+ * Clobber list : x1, x2
+ * ---------------------------------------------
+ */
+func console_putc
+ adrp x2, console_base
+ ldr x1, [x2, :lo12:console_base]
+ b console_core_putc
+
+ /* --------------------------------------------------------
+ * int console_core_putc(int c, unsigned long base_addr)
+ * Function to output a character over the console. It
+ * returns the character printed on success or -1 on error.
+ * In : x0 - character to be printed
+ * x1 - console base address
+ * Out : return -1 on error else return character.
+ * Clobber list : x2
+ * --------------------------------------------------------
+ */
+func console_core_putc
+ /* Check the input parameter */
+ cbz x1, putc_error
+ /* Prepend '\r' to '\n' */
+ cmp x0, #0xA
+ b.ne 2f
+1:
+ /* Check if the transmit FIFO is full */
+ ldr w2, [x1, #UARTFR]
+ tbnz w2, #PL011_UARTFR_TXFF_BIT, 1b
+ mov w2, #0xD
+ str w2, [x1, #UARTDR]
+2:
+ /* Check if the transmit FIFO is full */
+ ldr w2, [x1, #UARTFR]
+ tbnz w2, #PL011_UARTFR_TXFF_BIT, 2b
+ str w0, [x1, #UARTDR]
+ ret
+putc_error:
+ mov w0, #-1
+ ret
+
+ /* ---------------------------------------------
+ * int console_getc(void)
+ * Function to get a character from the console.
+ * It returns the character grabbed on success
+ * or -1 on error.
+ * Clobber list : x0, x1
+ * ---------------------------------------------
+ */
+func console_getc
+ adrp x0, console_base
+ ldr x1, [x0, :lo12:console_base]
+ cbz x1, getc_error
+1:
+ /* Check if the receive FIFO is empty */
+ ldr w0, [x1, #UARTFR]
+ tbnz w0, #PL011_UARTFR_RXFE_BIT, 1b
+ ldr w0, [x1, #UARTDR]
+ ret
+getc_error:
+ mov w0, #-1
+ ret
diff --git a/drivers/arm/pl011/pl011_console.c b/drivers/arm/pl011/pl011_console.c
deleted file mode 100644
index 81897ca..0000000
--- a/drivers/arm/pl011/pl011_console.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <assert.h>
-#include <console.h>
-#include <pl011.h>
-
-static unsigned long uart_base;
-
-void console_init(unsigned long base_addr)
-{
- /* TODO: assert() internally calls printf() and will result in
- * an infinite loop. This needs to be fixed with some kind of
- * exception mechanism or early panic support. This also applies
- * to the other assert() calls below.
- */
- assert(base_addr);
-
- /* Initialise internal base address variable */
- uart_base = base_addr;
-
- /* Baud Rate */
-#if defined(PL011_INTEGER) && defined(PL011_FRACTIONAL)
- pl011_write_ibrd(uart_base, PL011_INTEGER);
- pl011_write_fbrd(uart_base, PL011_FRACTIONAL);
-#else
- pl011_setbaudrate(uart_base, PL011_BAUDRATE);
-#endif
-
- pl011_write_lcr_h(uart_base, PL011_LINE_CONTROL);
-
- /* Clear any pending errors */
- pl011_write_ecr(uart_base, 0);
-
- /* Enable tx, rx, and uart overall */
- pl011_write_cr(uart_base, PL011_UARTCR_RXE | PL011_UARTCR_TXE |
- PL011_UARTCR_UARTEN);
-
-}
-
-#define WAIT_UNTIL_UART_FREE(base) \
- while ((pl011_read_fr(base) & PL011_UARTFR_TXFF)) \
- continue
-
-int console_putc(int c)
-{
- /* If the console has not been initialized then return an error
- * code. Asserting here would result in recursion and stack
- * exhaustion
- */
- if (!uart_base)
- return -1;
-
- if (c == '\n') {
- WAIT_UNTIL_UART_FREE(uart_base);
- pl011_write_dr(uart_base, '\r');
- }
-
- WAIT_UNTIL_UART_FREE(uart_base);
- pl011_write_dr(uart_base, c);
- return c;
-}
-
-int console_getc(void)
-{
- assert(uart_base);
-
- while ((pl011_read_fr(uart_base) & PL011_UARTFR_RXFE) != 0)
- ;
- return pl011_read_dr(uart_base);
-}