[PATCH] ppc: Remove powermac support from ARCH=ppc

This makes it possible to build kernels for PReP and/or CHRP
with ARCH=ppc by removing the (non-building) powermac support.
It's now also possible to select PReP and CHRP independently.
Powermac users should now build with ARCH=powerpc instead of
ARCH=ppc.  (This does mean that it is no longer possible to
build a 32-bit kernel for a G5.)

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 13 insertions, 148 deletions

diff --git a/arch/ppc/xmon/start.c b/arch/ppc/xmon/start.c
index c80177f8ec04..4344cbe9b5c5 100644
--- a/arch/ppc/xmon/start.c
+++ b/arch/ppc/xmon/start.c
@@ -18,7 +18,6 @@
 #include <asm/bootx.h>
 #include <asm/machdep.h>
 #include <asm/errno.h>
-#include <asm/pmac_feature.h>
 #include <asm/processor.h>
 #include <asm/delay.h>
 #include <asm/btext.h>
@@ -27,11 +26,9 @@ static volatile unsigned char *sccc, *sccd;
 unsigned int TXRDY, RXRDY, DLAB;
 static int xmon_expect(const char *str, unsigned int timeout);
 
-static int use_serial;
 static int use_screen;
 static int via_modem;
 static int xmon_use_sccb;
-static struct device_node *channel_node;
 
 #define TB_SPEED        25000000
 
@@ -112,96 +109,21 @@ xmon_map_scc(void)
 #ifdef CONFIG_PPC_MULTIPLATFORM
         volatile unsigned char *base;
 
-        if (_machine == _MACH_Pmac) {
-                struct device_node *np;
-                unsigned long addr;
-#ifdef CONFIG_BOOTX_TEXT
-                if (!use_screen && !use_serial
-                    && !machine_is_compatible("iMac")) {
-                        /* see if there is a keyboard in the device tree
-                           with a parent of type "adb" */
-                        for (np = find_devices("keyboard"); np; np = np->next)
-                                if (np->parent && np->parent->type
-                                    && strcmp(np->parent->type, "adb") == 0)
-                                        break;
-
-                        /* needs to be hacked if xmon_printk is to be used
-                           from within find_via_pmu() */
-#ifdef CONFIG_ADB_PMU
-                        if (np != NULL && boot_text_mapped && find_via_pmu())
-                                use_screen = 1;
-#endif
-#ifdef CONFIG_ADB_CUDA
-                        if (np != NULL && boot_text_mapped && find_via_cuda())
-                                use_screen = 1;
-#endif
-                }
-                if (!use_screen && (np = find_devices("escc")) != NULL) {
-                        /*
-                         * look for the device node for the serial port
-                         * we're using and see if it says it has a modem
-                         */
-                        char *name = xmon_use_sccb? "ch-b": "ch-a";
-                        char *slots;
-                        int l;
-
-                        np = np->child;
-                        while (np != NULL && strcmp(np->name, name) != 0)
-                                np = np->sibling;
-                        if (np != NULL) {
-                                /* XXX should parse this properly */
-                                channel_node = np;
-                                slots = get_property(np, "slot-names", &l);
-                                if (slots != NULL && l >= 10
-                                    && strcmp(slots+4, "Modem") == 0)
-                                        via_modem = 1;
-                        }
-                }
-                btext_drawstring("xmon uses ");
-                if (use_screen)
-                        btext_drawstring("screen and keyboard\n");
-                else {
-                        if (via_modem)
-                                btext_drawstring("modem on ");
-                        btext_drawstring(xmon_use_sccb? "printer": "modem");
-                        btext_drawstring(" port\n");
-                }
-
-#endif /* CONFIG_BOOTX_TEXT */
-
-#ifdef CHRP_ESCC
-                addr = 0xc1013020;
-#else
-                addr = 0xf3013020;
-#endif
-                TXRDY = 4;
-                RXRDY = 1;
-        
-                np = find_devices("mac-io");
-                if (np && np->n_addrs)
-                        addr = np->addrs[0].address + 0x13020;
-                base = (volatile unsigned char *) ioremap(addr & PAGE_MASK, PAGE_SIZE);
-                sccc = base + (addr & ~PAGE_MASK);
-                sccd = sccc + 0x10;
-
-        }
 #ifdef CONFIG_PPC_CHRP
-        else {
-                base = (volatile unsigned char *) isa_io_base;
-                if (_machine == _MACH_chrp)
-                        base = (volatile unsigned char *)
-                                ioremap(chrp_find_phys_io_base(), 0x1000);
-
-                sccc = base + 0x3fd;
-                sccd = base + 0x3f8;
-                if (xmon_use_sccb) {
-                        sccc -= 0x100;
-                        sccd -= 0x100;
-                }
-                TXRDY = 0x20;
-                RXRDY = 1;
-                DLAB = 0x80;
+        base = (volatile unsigned char *) isa_io_base;
+        if (_machine == _MACH_chrp)
+                base = (volatile unsigned char *)
+                        ioremap(chrp_find_phys_io_base(), 0x1000);
+
+        sccc = base + 0x3fd;
+        sccd = base + 0x3f8;
+        if (xmon_use_sccb) {
+                sccc -= 0x100;
+                sccd -= 0x100;
         }
+        TXRDY = 0x20;
+        RXRDY = 1;
+        DLAB = 0x80;
 #endif /* CONFIG_PPC_CHRP */
 #elif defined(CONFIG_GEMINI)
         /* should already be mapped by the kernel boot */
@@ -385,16 +307,6 @@ xmon_read_poll(void)
         return *sccd;
 }
 
-static unsigned char scc_inittab[] = {
-    13, 0,              /* set baud rate divisor */
-    12, 1,
-    14, 1,              /* baud rate gen enable, src=rtxc */
-    11, 0x50,           /* clocks = br gen */
-    5,  0xea,           /* tx 8 bits, assert DTR & RTS */
-    4,  0x46,           /* x16 clock, 1 stop */
-    3,  0xc1,           /* rx enable, 8 bits */
-};
-
 void
 xmon_init_scc(void)
 {
@@ -407,43 +319,6 @@ xmon_init_scc(void)
                 sccd[3] = 3; eieio();           /* LCR = 8N1 */
                 sccd[1] = 0; eieio();           /* IER = 0 */
         }
-        else if ( _machine == _MACH_Pmac )
-        {
-                int i, x;
-
-                if (channel_node != 0)
-                        pmac_call_feature(
-                                PMAC_FTR_SCC_ENABLE,
-                                channel_node,
-                                PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
-                        printk(KERN_INFO "Serial port locked ON by debugger !\n");
-                if (via_modem && channel_node != 0) {
-                        unsigned int t0;
-
-                        pmac_call_feature(
-                                PMAC_FTR_MODEM_ENABLE,
-                                channel_node, 0, 1);
-                        printk(KERN_INFO "Modem powered up by debugger !\n");
-                        t0 = readtb();
-                        while (readtb() - t0 < 3*TB_SPEED)
-                                eieio();
-                }
-                /* use the B channel if requested */
-                if (xmon_use_sccb) {
-                        sccc = (volatile unsigned char *)
-                                ((unsigned long)sccc & ~0x20);
-                        sccd = sccc + 0x10;
-                }
-                for (i = 20000; i != 0; --i) {
-                        x = *sccc; eieio();
-                }
-                *sccc = 9; eieio();             /* reset A or B side */
-                *sccc = ((unsigned long)sccc & 0x20)? 0x80: 0x40; eieio();
-                for (i = 0; i < sizeof(scc_inittab); ++i) {
-                        *sccc = scc_inittab[i];
-                        eieio();
-                }
-        }
         scc_initialized = 1;
         if (via_modem) {
                 for (;;) {
@@ -632,19 +507,9 @@ xmon_fgets(char *str, int nb, void *f)
 void
 xmon_enter(void)
 {
-#ifdef CONFIG_ADB_PMU
-        if (_machine == _MACH_Pmac) {
-                pmu_suspend();
-        }
-#endif
 }
 
 void
 xmon_leave(void)
 {
-#ifdef CONFIG_ADB_PMU
-        if (_machine == _MACH_Pmac) {
-                pmu_resume();
-        }
-#endif
 }