Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / cpu / 74xx_7xx / speed.c

diff --git a/qemu/roms/u-boot/arch/powerpc/cpu/74xx_7xx/speed.c b/qemu/roms/u-boot/arch/powerpc/cpu/74xx_7xx/speed.c
new file mode 100644 (file)
index 0000000..5ffa41c
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/cpu/74xx_7xx/speed.c
@@ -0,0 +1,165 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <74xx_7xx.h>
+#include <asm/processor.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern unsigned long get_board_bus_clk (void);
+
+static const int hid1_multipliers_x_10[] = {
+       25,     /* 0000 - 2.5x */
+       75,     /* 0001 - 7.5x */
+       70,     /* 0010 - 7x */
+       10,     /* 0011 - bypass */
+       20,     /* 0100 - 2x */
+       65,     /* 0101 - 6.5x */
+       100,    /* 0110 - 10x */
+       45,     /* 0111 - 4.5x */
+       30,     /* 1000 - 3x */
+       55,     /* 1001 - 5.5x */
+       40,     /* 1010 - 4x */
+       50,     /* 1011 - 5x */
+       80,     /* 1100 - 8x */
+       60,     /* 1101 - 6x */
+       35,     /* 1110 - 3.5x */
+       0       /* 1111 - off */
+};
+
+/* PLL_CFG[0:4] table for cpu 7448/7447A/7455/7457 */
+static const int hid1_74xx_multipliers_x_10[] = {
+       115,    /* 00000 - 11.5x  */
+       170,    /* 00001 - 17x    */
+       75,     /* 00010 -  7.5x  */
+       150,    /* 00011 - 15x    */
+       70,     /* 00100 -  7x    */
+       180,    /* 00101 - 18x    */
+       10,     /* 00110 - bypass */
+       200,    /* 00111 - 20x    */
+       20,     /* 01000 -  2x    */
+       210,    /* 01001 - 21x    */
+       65,     /* 01010 -  6.5x  */
+       130,    /* 01011 - 13x    */
+       85,     /* 01100 -  8.5x  */
+       240,    /* 01101 - 24x    */
+       95,     /* 01110 -  9.5x  */
+       90,     /* 01111 -  9x    */
+       30,     /* 10000 -  3x    */
+       105,    /* 10001 - 10.5x  */
+       55,     /* 10010 -  5.5x  */
+       110,    /* 10011 - 11x    */
+       40,     /* 10100 -  4x    */
+       100,    /* 10101 - 10x    */
+       50,     /* 10110 -  5x    */
+       120,    /* 10111 - 12x    */
+       80,     /* 11000 -  8x    */
+       140,    /* 11001 - 14x    */
+       60,     /* 11010 -  6x    */
+       160,    /* 11011 - 16x    */
+       135,    /* 11100 - 13.5x  */
+       280,    /* 11101 - 28x    */
+       0,      /* 11110 - off    */
+       125     /* 11111 - 12.5x  */
+};
+
+static const int hid1_fx_multipliers_x_10[] = {
+       00,     /* 0000 - off */
+       00,     /* 0001 - off */
+       10,     /* 0010 - bypass */
+       10,     /* 0011 - bypass */
+       20,     /* 0100 - 2x */
+       25,     /* 0101 - 2.5x */
+       30,     /* 0110 - 3x */
+       35,     /* 0111 - 3.5x */
+       40,     /* 1000 - 4x */
+       45,     /* 1001 - 4.5x */
+       50,     /* 1010 - 5x */
+       55,     /* 1011 - 5.5x */
+       60,     /* 1100 - 6x */
+       65,     /* 1101 - 6.5x */
+       70,     /* 1110 - 7x */
+       75,     /* 1111 - 7.5 */
+       80,     /* 10000 - 8x */
+       85,     /* 10001 - 8.5x */
+       90,     /* 10010 - 9x */
+       95,     /* 10011 - 9.5x */
+       100,    /* 10100 - 10x */
+       110,    /* 10101 - 11x */
+       120,    /* 10110 - 12x */
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Measure CPU clock speed (core clock GCLK1, GCLK2)
+ *
+ * (Approx. GCLK frequency in Hz)
+ */
+
+int get_clocks (void)
+{
+       ulong clock = 0;
+
+#ifdef CONFIG_SYS_BUS_CLK
+       gd->bus_clk = CONFIG_SYS_BUS_CLK;       /* bus clock is a fixed frequency */
+#else
+       gd->bus_clk = get_board_bus_clk ();     /* bus clock is configurable */
+#endif
+
+       /* calculate the clock frequency based upon the CPU type */
+       switch (get_cpu_type()) {
+       case CPU_7447A:
+       case CPU_7448:
+       case CPU_7455:
+       case CPU_7457:
+               /*
+                * Make sure division is done before multiplication to prevent 32-bit
+                * arithmetic overflows which will cause a negative number
+                */
+               clock = (gd->bus_clk / 10) *
+                       hid1_74xx_multipliers_x_10[(get_hid1 () >> 12) & 0x1F];
+               break;
+
+       case CPU_750GX:
+       case CPU_750FX:
+               clock = (gd->bus_clk / 10) *
+                       hid1_fx_multipliers_x_10[get_hid1 () >> 27];
+               break;
+
+       case CPU_7450:
+       case CPU_740:
+       case CPU_740P:
+       case CPU_745:
+       case CPU_750CX:
+       case CPU_750:
+       case CPU_750P:
+       case CPU_755:
+       case CPU_7400:
+       case CPU_7410:
+               /*
+                * Make sure division is done before multiplication to prevent 32-bit
+                * arithmetic overflows which will cause a negative number
+                */
+               clock = (gd->bus_clk / 10) *
+                       hid1_multipliers_x_10[get_hid1 () >> 28];
+               break;
+
+       case CPU_UNKNOWN:
+              printf ("get_gclk_freq(): unknown CPU type\n");
+              clock = 0;
+              return (1);
+       }
+
+       gd->cpu_clk = clock;
+
+       return (0);
+}
+
+/* ------------------------------------------------------------------------- */